Questions: 2a) According to this diagram, the following must also be true about

Question

Questions:

2a) According to this diagram, the following must also be true about the indices of refraction of the two media.

a) n1 > n2

b) n1 < n2

c) n1 = n2

d) n1 < 1

2b) The following must also be true about the angles which the incident and reflected beams make with the boundary normal.

a) 1 > out

b) 1 < out

c) 1 = out

2c) According to the diagram, the following must also be true about the incident angle.

2d) The following must also be true about the critical angle for total internal relection at the boundary of the two media in the diagram

Explanation / Answer

2a)

The total internal reflection occurs only when light travels from a higher -index medium towards a lower -index medium.

so from the diagram n1>n2

so answer is (a)

(2b)

According to snell's law 1 = (out)

so answere is c

(2c)

1<= sin^-1(n2/n1)

answer is c

(2d)

sinc = n2 sin90/n1

sinc = n2/n1

c = sin^-1(n2/n1)

so the answer is a

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