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Blue Laser Light
How do i work out the critical angle? HELP!?
Light from a laser with a wavelength of 633nm (633x10^-9) travels through the air and strikes a glass block at normal incidence, that is, at right angles to the surface. The refractive index of the glass is 1.52.
Q1: What is the critical angle for the laser light traveling from the glass block into air?
Q2: Would the critical angle for blue light of 405nm wavelength be smaller or bigger than for red light at 633nm? Give your reason
Refractive index of glass is μ = 1.52
If c is the critical angle ,then sin c = 1/ μ = 1/1.52
c = 41.14˚
=============================
μ = speed in air/ speed in medium = λ in air / λ in medium.
λ in medium for green is less than that for red.
μ is greater for green than that for red.
1/ μ is less for green than for red.
C is less for green .
============================
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5mW Aurora Blue Laser Pointer Aurora - beautiful beam effects
