| (i) There is no change in the direction of ray at P because light ray incident on semicircular block at \[90{}^\circ .\] |
| (ii) As light rays enters the semicircular block, its frequency remains the same. |
| (iii) Wavelength of light rays as it enters the block decreases. |
| (iv) Speed of light as it enters the block increases. |
A)
(i)
(ii)
(iii)
(iv)
T
F
F
T
B)
(i)
(ii)
(iii)
(iv)
F
T
T
F
C)
(i)
(ii)
(iii)
(iv)
T
T
T
F
D)
(i)
(ii)
(iii)
(iv)
F
F
F
T
Correct Answer: C
Solution :
Speed of light as it enters the block decreases because it is entering from rarer to denser medium.
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