When light is reflected from a surface while remaining in the same medium, which set of quantities remains unchanged?
ASpeed, wavelength and frequency
BFrequency, amplitude and intensity
CSpeed, amplitude and intensity
DWavelength, amplitude and intensity
Answer & Solution
Correct answer: A. Speed, wavelength and frequency
During reflection in the same medium, the light does not change medium, so its speed, wavelength, and frequency remain unchanged. However, some energy may be absorbed at the surface, so amplitude and intensity of the reflected ray are usually reduced.
Related questions
If a source emits sound of frequency 500 Hz and moves at 20 m/s toward a stationary observNewton's formula for the speed of sound in air (assuming isothermal process) predicted a vFor a longitudinal wave in air, the excess pressure and displacement are related such thatThe wave equation y = 0.05 sin(20πx − 100πt) SI units. The wave speed isThe fundamental frequency of a vibrating string of length L, tension T, linear density μ iTwo waves overlap to produce a standing wave on a string. The nodes are points whereThe speed of light in vacuum isWhen a wave is reflected from a rigid boundary (fixed end of a string), the reflected wave