Question

True or false for the following: A) Light can be totally internally reflected when it tries...

True or false for the following:

A) Light can be totally internally reflected when it tries to go from a less dense material (smaller n) into a more dense material (larger n).

B) The frequency of the light also changes when it travels between different mediums.

C) When a light wave travels from a more dense medium (like water) into vacuum (complete lack of matter), the velocity of the light decreases.

Homework Answers

Answer #1

Answer (a):- False.

The essential condition for total internal reflection is to be happened that light rays must goes from denser to rarer medium.

Answer(b):-False

Because , frequency ×wavelenth = speed of wave.

So according to this if some how speed changes in going form one medium to another so , only wavelength changes with such factor from which speed changes to make frequency constant or unchanged.

Answer:-(C) False

In going from denser to rarer medium , speed of light increase because there (vacuum) is no hindrance to appose the motion of speed of light in vaccum as compared to denser medium.

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