Optics, the resulting power of the lens .?

In summary, a thin lens with a refractive index of 1.5 and a front surface power of +11 d and back surface power of -6d, when submerged in a liquid with a refractive index of 1.6, will have a resulting power of -1 dioptre. This can be calculated using the equation P = P1 + P2 - P1P2n, where P1 and P2 are the powers of the two surfaces and n is the refractive index of the liquid. The resulting negative power indicates that the lens will diverge light rays.
  • #1
mero coactail
3
0
optics, the resulting power of the lens...??

a thin lens , made of refractive index 1.5,has a front surface +11 d power and back surface -6d ..if this lens is submerged in a liquid of refractive index 1.6, the resulting power of the lens is...

a)-1 dioptre

b)+1 dioptre

c)-5 dioptre

d)+5 dioptre

pleasezzz answer ,,,and why please ..its emergency:frown:..
 
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  • #2
hi mero coactail! welcome to pf! :wink:
mero coactail said:
a thin lens , made of refractive index 1.5,has a front surface +11 d power and back surface -6d ..if this lens is submerged in a liquid of refractive index 1.6, the resulting power of the lens is...

a)-1 dioptre

b)+1 dioptre

c)-5 dioptre

d)+5 dioptre

pleasezzz answer ,,,and why please ..its emergency:frown:..

what equations are relevant here?

show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
 

Related to Optics, the resulting power of the lens .?

1. How does the power of a lens affect its ability to refract light?

The power of a lens is determined by its curvature and is measured in units called diopters. The higher the power of a lens, the greater its ability to bend or refract light. This is because a lens with a higher power has a stronger curvature, allowing it to bend light more effectively.

2. Can the power of a lens be changed?

Yes, the power of a lens can be changed by altering its curvature. This can be achieved by changing the shape of the lens or by adding layers of material to the lens, which changes its refractive index.

3. How does the power of a lens affect its focal point?

The focal point of a lens is directly related to its power. A lens with a higher power will have a shorter focal length, meaning that light will converge at a closer distance from the lens. Conversely, a lens with a lower power will have a longer focal length and light will converge at a farther distance.

4. What is the relationship between the power of a lens and its magnifying ability?

The power of a lens is directly related to its magnifying ability. A lens with a higher power will magnify objects more, while a lens with a lower power will magnify objects less. This is because a lens with a higher power bends light at a greater angle, making objects appear larger.

5. How does the power of a lens affect its ability to correct vision?

The power of a lens is essential for correcting vision in individuals with refractive errors such as nearsightedness or farsightedness. The power of the lens needed to correct these errors is determined by the individual's prescription, and a lens with the appropriate power will help to focus light onto the retina, improving vision.

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