What is Ray: Definition and 516 Discussions

Finland's Slot Machine Association or RAY (Finnish: Raha-automaattiyhdistys) was a government-supervised and -owned nonprofit gaming (gambling) association (statutory corporation) in Finland. On January 1, 2017 RAY merged with the government-supervised and -owned nonprofit betting agency Veikkaus and Fintoto. The new company that was founded as a result is also called "Veikkaus". RAY was a gambling monopoly whose proceedings went to domestic charity such as pensioner care and gambling addiction treatment. While RAY was best known for its slot machines, the company also dealt in online gambling and controlled the only official casino in Finland, Casino Helsinki.RAY's operations were governed by legislation and decrees. The operations of the other Finnish gaming organisations, Veikkaus and Fintoto, are also based on the Finnish Lotteries Act. The act was last amended in 2012.RAY's revenue came from slot machines, casino games, and casino and digital gaming. All the proceeds from RAY's gaming operations were used to support Finnish health and welfare, and these funding decisions were also based on legislation.The history of the Tuplapotti predecessor, the Potti game, dates back to 1986, and in the 1990s a newer version of it was developed that rose to much greater popularity than its predecessor. The game was developed by Veikkaus (by then known as RAY), and the game is still one of the favorite gambling games in Finland.

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  1. J

    Gamma ray burst, LQG and String Theory

    I was reading this: https://www.physicsforums.com/showthread.php?t=181830 I was wondering if there is any up to day info about the speed of gamma ray burst that could confirm or debunk these claims. Or are LQG and String Theory in troubles?
  2. N

    Cathode Ray Type Question - Electron being moved by horizontal plates

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  3. wolram

    Exploring the Most Distant Gamma Ray: Insights from GRB 080913

    http://www.sciencedaily.com/releases/2008/09/080919185809.htm * "This is the most amazing burst Swift has seen," said the mission's lead scientist Neil Gehrels at NASA's Goddard Space Flight Center in Greenbelt, Md. "It's coming to us from near the edge of the visible universe."...
  4. B

    How Does Ray Tracing with Multi-Lens Systems Work?

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  5. B

    Simple Ray Optics Problem-Check my answer?

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  6. C

    NASA Gamma ray map of the galaxy completed by NASA

    Very cool image. Does anyone know, is anything in the information we got from this so far at all surprising? Is it likely we will learn anything about gamma ray bursts from this or is more information
  7. B

    Coincidence summing in gamma ray spectrometry

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  8. C

    Atmospheric Gamma Ray Interactions

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  9. Gamma

    Consider a ray at the interface air and glass

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  10. P

    What are the Unanswered Questions About Gamma Ray Particles?

    questions about life of gamma ray particle question-are gamma ray particles unchanged after gamma ray burst 13 billion years ago? question-are changes detected not due to travel through normal space, scattering? changes due to dark matter/energy? question-positronium decay at end universe...
  11. A

    When a ray is traveling from air to water

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  12. S

    Solving Cathode Ray Tube Homework with Mass, Speed & Magnetic Field

    Homework Statement A positively charged particle of mass 7.2 * 10^-8kg is traveling east with speed of 85 m/s. The particle enters a 0.31 T uniform magnetic field, and 2.2 * 10^-3 secounds later leaves the field one-quarter south with speed of 85 m/s. What is the charge of the particle and...
  13. K

    Ray of light travelling through universe (applying cosmological principle)

    cosmological principle states that, on large spatial scales, universe is homogeneous and isotropic. in other words, universe looks the same in every direction and that is true for every point of view. there are some challanges to this principle, but for this discussion, I will assume it is...
  14. S

    Dissecting a cathode ray tube television

    I'm considering dissecting an old, color cathode ray tube television. Do cathode ray tube televisions have capicitors in them that could shock me?
  15. B

    Calculating the Refraction Angle of a Light Ray Incident on a Prism

    Homework Statement A light ray is incident on a prism whose apex angle is 65.0°. The ray is incident at θa and leaves the prism with θa = θd. The refractive index of the prism glass is 1.54. Calculate θ ans:55.8° Homework Equations n1sin\phi1=n2sin\phi2 The Attempt at a...
  16. Ivan Seeking

    Archimedes' Death Ray: Myth or Reality?

    http://web.mit.edu/2.009/www/experiments/deathray/10_ArchimedesResult.html
  17. H

    What is the energy comparison between a gamma ray burst and vaporizing the sun?

    Homework Statement a) A back-of-the-envelope calculation shows that in about 120 seconds the gamma ray burst released a total energy of about 10^48 Joule. How does this compare to the total energy that would be released by instantly vaporizing our sun into pure energy? (The sun's mass is...
  18. B

    Solve Ray Tracing Problem: Image Location for 6.3 cm from Convex Mirror

    Ray Tracing...HELP! Homework Statement An object is 6.3 cm from a convex mirror with a focal length of 10 cm. Use ray tracing to determine the location of its image. Homework Equations The Attempt at a Solution 1/f = 1/s + 1/s' 1/f - 1/s = 1/s' 1/10 - 1/6.3 = -0.0587 cm ^ -1 =...
  19. B

    How Do You Calculate Ray and Ellipsoid Intersections?

    So I have an array p(t) = e + td, where e is the start position, t is some parameter, and d is the direction of the ray For a sphere with center c and radius R, the vector form equation is (p-c).(p-c)-R^2=0 This can be algebraically manipulated into: t = (-d.(e-c) +- sqrt((d.(e-c))^2 -...
  20. T

    Gamma Ray burst in the Milkey Way

    If the exploding star that caused the gamma ray burst on Wednesday had occurred as close to us as Alpha Centauri what would be the effect on Earth?
  21. E

    Gravity field phenomenon is the curved light ray ?

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  22. S

    Deflection angle of a ray grazing the sun

    I saw in a website that Einstein found the deflection angle of a ray grazing the sun through this relation alpha=4GM/c2r=1.74 arc sec but when i used this relation by giving values i didnt get this value 1.74...wats wrong..can anyone solve this ...
  23. P

    Concave Mirror Lens Ray Diagram

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  24. Z

    Angle of Light Ray Entry & Exit Through Prism

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  25. H

    Ray Tracing Box Intersection: (3,8) to (6,-1), (-2,3), and i-5j

    Ok, so this is probably a really basic question, and I've got a feeling that my brain is just too 'fuzzy' just now and that all my problem is is simple arithmetic, but here it goes... 1. Determine whether or not the box with vertices at (2,1), (5,1), (5,5), and (2,5) is intersected by the...
  26. M

    Do Dark or Light Colored Clothes Offer More UV Ray Protection?

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  27. P

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  28. B

    Find the frequency and wavelength of a 100 MeV gamma ray photon

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  29. wolram

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  30. Saladsamurai

    Calculating Earth's Total Electric Current from Cosmic Ray Protons

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  31. D

    Cathode Ray - No Electric Field

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  32. P

    Understanding Cathode Ray Tubes: Exploring Electron Movement

    Can somebody please explain what actually happens in cathode ray tube? Is there any current passing through the tube? How does the anode (positive electrode) lost electrons? Is it before the effect of cathode rays? How does the cathode (negative electrode) have bigger amount of electrons? Is it...
  33. S

    LIGO detects no gravitational waves from gamma ray burst

    On February 1, 2007, the Konus-Wind, Integral, Messenger, and Swift gamma-ray satellites measured a short but intense outburst of energetic gamma rays originating in the direction of M31, the Andromeda galaxy, located 2.5 million light-years away. The majority of such short (less than two...
  34. K

    Is the Russian Helicopter Death Ray Based on Multi-Beam Klystron Technology?

    hi i was wondering about the russian helicopter death ray and if it was based on the russian multi beam klystrons and all in one technology. does it use tesla multi beam technology? thanks
  35. H

    Simulation: ray of light near black hole

    Caveat 1: I'm not sure if this message should be posted here, or in the Programming forum. Caveat 2: I have a BS in Physics, obtained more than a decade ago, but never actually worked in the field. So I'm a bit rusty. :redface: OK, more than a bit. I am writing a program to simulate the...
  36. L

    Understanding Optics: Exploring the Inverted Ray Diagram with 2 Lenses

    I need some help with the 2 lens inverted ray diagram. Like i need someone to describe to me what it looks like or could show me an example of 1. thxn
  37. Robert100

    Advice on making laser ray box for teaching

    Next month I am going to be teaching my 9th grade "Physics First" classes about optics, and I'd like to use a set of lasers to show them how rays diverge and converge in various situations. Students will literally be able to see things like this...
  38. A

    Why Don't Electrons Stick to the Anode in a Cathode Ray Tube?

    Homework Statement I'm have a little problem with understanding the workings of a cathode ray tube. I understand that a filament is heated and that in turn heats the cathode which, due to thermionic emission emits electrons. OK so here is my problem. A positively charged anode is used to...
  39. J

    What are the main sources of gamma ray bursts both short and long duration

    Hey guys having a bit of problem with my year 1 essay. Would really appreciate any help :) What are the main sources of gamma ray bursts both short and long duration? I know some are from supernovae but where do others come from?
  40. G

    Ray Diagram for Concave Mirror: Image Position & Height

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  41. S

    Refractive index, light ray help

    Hi, this is the question in my homework. Explain what happens when a light ray enters and leaves a glass block if it hits the face of the block at right angles to it. Can someone pelase help me, i think that the light ray would just go straight through the block without bending but I am...
  42. J

    Can the Speed of a Gamma Ray Burst Exceed the Speed of Light?

    I was watching a show on Discovery about things that could end the Earth and one of them was a Gamma Ray Burst. They said on the show that by the time we knew it was coming towards us, it would be too late but if it moves a the speed of light or slower wouldn't that mean that we would see the...
  43. A

    Electron in magnetic field and cathode ray tube

    If the motion of an electron creats a magnetic field around it then why is an electron beam in a cathode ray tube deflected at right angles and not towards the magnetic field? Also, what would be the effect of a magnetic field on a stationary (relative to the field)electron?
  44. Q

    Cosmic Ray Muon Production Altitude is not right

    Cosmic Ray Muon Production Altitude is not right! Hi there, I wrote a Programm to calculate the cosmic ray muon intensity on different altitudes. I dedicated this programm from the intensity of the primary cosmic rays and the intercations in the atmosphere. First a Proton with the Energy...
  45. A

    Cosmic ray and photon collisions

    ive been researching cosmic rays, and came across this question that i can't quite work out. can anyone help? what is a cosmic ray proton of Etot 10^9 Gev, collides head on with a low energy photon from remnant 3K balck body radiation in the universe. if the photon has energy kT, can we work...
  46. O

    How do I create a ray diagram for refraction using a beaker and pencil?

    Hey guys I'm new here and I'm lookin' for some help as I'm sure a lot of you come here for that reason as well. I did an experiment where I fill a 150 mL half full, place a pencil in the middle and move it sideways until it reaches the side of the beaker. Then I am to draw a ray diagram of what...
  47. L

    X ray diffraction For crystal structure Analysis

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  48. N

    Ray Kurzweil: genius or naive optimist?

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  49. R

    Here's a question on light ray optics and focal length.

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  50. S

    Gamma Ray Bursts: Nature & Why they Last 2 Seconds

    Hello Guys! Please help me in this question: What is the nature of the gamma ray bursts? Why do they last for mo only 2 seconds? thx!
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