A camera filled with a polarizer is placed on a mountain in a manner to record only the reflected image of the sun from the surface of a shown in the figure. If the sun rise at 6.00 AM and sets at 6.00 PM during the summer, then at what time in the aftermoon will the recorded image have the lowest intensity, assuming there are no clouds and intensity of the sun at the sea surface is constant throughout the day?

Options

A. `12.32PM`
B. `3.32PM`
C. ` 5.00PM`
D. `6.00PM`

Answer

B

Explanation

Camera will receive minimum intensity when. Light will incident at Brewsters’s angle.
`therefore I = mu = 4//3`
` (##ALN_KVPY_20_SB_SX_E02_011_S02.png" width="80%">
time taken by sun to go from A to P will be ` (12 hr )/(180^@ ) xx 143^@ =9.53 hr = 9 hr 32 min`
` therefore ` time ` = 6 AM + 9 hr 32 min implies 3:32 PM`