PLEASE EXPLAIN HOW TO DO THESE QUESTIONS, HOW YOU ARRIVED AT THE ANSWER, AND WHI

Question

PLEASE EXPLAIN HOW TO DO THESE QUESTIONS, HOW YOU ARRIVED AT THE ANSWER, AND WHICH FORMULAS ARE USED AND WHY. THANKS!

Indicate the direction of the current through the resistor just after the switch has been closed and just after the switch has been opened. A man is fishing in a stream. He is watching a fish in the water until the fish swims away and suddenly the fisherman can no longer see the fish. What is the minimum angle that light from the fish makes with the normal of the water surface such that the light is not transmitted out of the water?

Explanation / Answer

1)

option B is correct

2)

c=sin-1(1/u)

=sin-1(1/1.33)

=48.7534 degrees

=48.8 (approximatly)

so,

option C is correct

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