What is White light: Definition and 70 Discussions

why is the light from the sun called white light?

Hi, I need to make a demonstration that shows that white light is composed of different colors. I do not have a prism, and will not be able to obtain one in time. I have a white LED flash light, and I tried some improvisations with different objects (bottles, glasses etc), but none seems to...

Good morning. Woke up this morning around 5:45 am. When I got up and walked to the hallway from my bedroom, I noticed a very quick bright white flash above my loveseat in my living room area. Kinda shocked me for a few seconds. I stood still trying to figure it out. The area was too far from my...

A ray of white light strikes the surface of a 4.0-cm-thick slab of flint glass as shown in the figure. As the ray enters the glass, it is dispersed into its constituent colors. Estimate how far apart the rays of deepest red and deepest violet light are as they exit the bottom surface. the light...

I have a little prism and I have a bright flashlight the emits white light and when I shine the flash light into the prism it does not break it up into the colors of the rainbow , any suggestions , I have tried from all angles .

Hello, I wanted to make a post about this, because this is a topic that has bothered me for a very long time. I live in a very mountainous region, and I just recently discovered that there have been stories going around this area for a long time about something that I saw when I was much...

Hi: Is it possible to generate coherent white light? This is sort of like laser light except it gives out all wavelengths of visible light at equal intensities at the same time. Is this possible?Thanks, Radium

Hi, I have a physics assignment which is asking me what the fringe pattern would look like if white light was passed through a double slit. Would it look like a single light which became gradually darker the further away it got from the central maximum? Thanks in advance Richard.

I've been wondering about this lately. We've most likely all seen the basic example at school of projecting three colours of light at a screen and noticing that the area where the colours overlap turns out to be white. But what I'm wondering is whether there is actually any physics to that. Does...

Homework Statement Suppose a reflected white light is used to observe a thin transparent coating on glass as the coating material is gradually deposited by evaporation in a vacuum, Describe color changes that might occur during the process of building up the thickness of the coating...

Hi, I have a question about the dispersion of white light in prism. Why different color of light have different speed in prism ? What properties of light affect its speed ?

Homework Statement # It is given in my book that if white light is used instead of monochromatic light, the central fringe will be white while there will be coloured fringes on either side of the central fringe. Could anyone please tell me the reason for this? Is it because, due to...

Hello to all, White light is made up of all the wavelengths that are in the visible spectrum, and we can see it’s constituents via dispersion in a prism. My question is ; How are these different wavelengths kept together while light is traveling from it’s source to my eyes ? Is there a...

White light (ranging in wavelengths from 380 to 750 nm) is incident on a metal with work function Wo = 2.46 eV. (a) What is the maximum kinetic energy of the electrons emitted from the surface? KEmax = eV E = hf = hc/lamda. E = (6.626*10^-34)(3*10^8) / (750*10^-9) = 2.6504E-19...

Hey Here is the problem, I think I may be stuck but I'll provide all the information I have so far. White light (400-700nm) is incident on a 600 line/mm diffraction grating. What is the width of the first order rainbow on a screen 2.0m behind the grating? What I figured was to use the...

and does the sun also genrate the full EM spectrum? why does it do that and not a certain wavelength, is it possible to have certain ones, is that what dead stars do, like pulsars only emit radiowaves?

Hi, I conducted an experiment with the Michelson Inteferometer to obeserve white light fringes but I cannot explain the presence of a central black fringes. I understand a phase shift of pi is introduced in one of the beams but where/how does this shift occur? thanks

:redface: How is White light form? I know that it is a combination of 7 colours...But just want to know how the 7 light with different frequencies merged?

White light containing wavelengths from 405 nm to 760 nm falls on a grating with 7510 lines/ cm. How wide is the first-order spectrum on a screen 2.29 m away? I'm not sure the way this question is worked out, but what I have so far is sin(theta)=[m*Lambda+ m*Lambda]/d d=1/7510cm=1.33e-6m...

This question really has me stumped..i would appreciate it if anyone could help me out:smile: White light containing wavelengths of 400nm to 750 nm is shone normally onto a diffraction grating of 3000 lines/cm. Calculate the width of the spectrum that appears as the second antinode on a...