In each trial the material and hence the index of refraction in the region between the barrier and the screen is 487.8 nm
Given D=2.05,d=5
m=1,Y1=20cm
we have d sinθ = mλ
λ=dYn/mD=
5*10⁻⁶*20*10⁻²/1*2.05
λ=487.8 nm
In physics, refraction is the direction change brought on by a wave's speed change as it passes through one medium and enters another. In deep water, for instance, waves move more quickly than in shallow water. When two materials with different densities, such as air and glass, are in contact, light waves change their speed. Refraction is the term for the resultant change in direction that results.
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