Question

4. The refractive indices of four media A, B, C and D are given in the following table:
MEDIUM
REFRACTIVE
INDEX
A
1.33
B
1.50
©
1.52
2.40
If light, travels from one medium to another, in which case the change in speed will be
minimum
maximum?
1 MARK
5 Redraw the given diagram and​

Answer 1

Explanation:

When light travels from vacuum to a medium of refractive index ‘n’ then it’s speed changes from c to c/n. So the speed will be minimum at medium D and Maximum at medium A