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.
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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