Question

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Answer 1

Answer:

first one the speed of light decreases

second one the speed of light increases

Explanation:

for first one as refractive index increases then speed of light decreases.

for second as refractive index decreases there is a increase in the speed of light.

for third magnetic field lines are individual lines from each pole of the magnet and enter into the next pole without merging with other due to charge separation.

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Answer 2

Answer:

1) as refractive index increases then speed of light decreases.

2) as refractive index decreases there is a increase in the speed of light.

3) if they cross at each other the magnetic compass needle will deflect in both north and south direction which is not possible

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