When light travels from a rarer to denser medium, it loses some speed. Does the reduction in speed imply a reduction in the energy carried by the light wave ?
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We know that total average energy density associated with an electromagnetic wave (i.e. light wave) is `u_(av) = (B_(0)^(2))/(2mu_(0)) = (1)/(2) in_(0)E_(0)^(2)` This shows that `u_(av)` depends upon `B_(0) and E_(0)` (i.e. the amplitude of magnetic vector and eletric vector). `u_(av)` is independent of the speed of wave propagation. Therefore, the wave may lose speed, but not the energy.
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(a) When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. Explain why ? (bb) When light travels from a rarer to a denser medium, the speed decreases. Does the reduction in speed imply a reduction in the energy carried by the light wave? c) In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. What determines the intensity of light in the photon picture of light.
Assertion: When a light wave travels from a rarer to a denser medium, it loses speed. The reduction in speed imply a reduction in energy carried by the light wave. Reason: The energy of a wave is proportional to velocity of wave.
A: When light travels from a rarer to a denser medium, it loses some speed but it doesn't imply a reduction in the energy carried by the light wave. R: Energy carried by a wave depends on the amplitude of the wave and not on the speed of wave propagation.
When light travels from a rarer medium to a denser medium, it ________
Assertion (A): When a light wave travels from rarer to denser medium, its speed decreases. Due to this reduction of speed the energy carried by the light wave reduces. Reason (R): Energy of wave is proportional to the frequency.
When a wave travels from a denser to rarer medium, then
