- #1
Sarah K
- 1
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1. The Problem
A thin beam of white light is directed at an angle α = 36.4° with respect to the horizontal, onto the top of a square block of silicate flint glass near its top corner. The perpendicular length of the block (or height is 1cm). The block’s refractive index n is 1.66 for blue light (λ0 = 400 nm) and 1.61 for red light (λ0 = 700 nm). The block is surrounded by vacuum.
Find the lateral displacement l between the two rays leaving the bottom surface of the block, as shown. (Note that l is measured perpendicularly to the rays.)
2.The relevant equation:
n1sin(theta1)=n2sin(theta2)
I do realize that I need use this formula twice
but I am not exactly sure what LATERAL DISPLACEMENT means :S
if someone can explain what is it I am supposed to find, I would appreciate it.
Hints are more than welcome.
Thanks
A thin beam of white light is directed at an angle α = 36.4° with respect to the horizontal, onto the top of a square block of silicate flint glass near its top corner. The perpendicular length of the block (or height is 1cm). The block’s refractive index n is 1.66 for blue light (λ0 = 400 nm) and 1.61 for red light (λ0 = 700 nm). The block is surrounded by vacuum.
Find the lateral displacement l between the two rays leaving the bottom surface of the block, as shown. (Note that l is measured perpendicularly to the rays.)
2.The relevant equation:
n1sin(theta1)=n2sin(theta2)
I do realize that I need use this formula twice
but I am not exactly sure what LATERAL DISPLACEMENT means :S
if someone can explain what is it I am supposed to find, I would appreciate it.
Hints are more than welcome.
Thanks