Doppler's move measures the change in & observer. of wave due to the relative motion of source
Correct answer: B. Frequency
- A. Intensity
- B. Frequency
- C. Velocity
- D. Energy
Explanation
The Doppler effect describes the change in frequency (or wavelength) of a wave relative to an observer who is moving relative to the source of the wave. If the source and observer move closer, the observed frequency increases; if they move apart, the frequency decreases. The intensity, velocity, and energy of the wave are not affected by this effect. Intensity relates to amplitude, velocity is constant in a medium, and energy is not directly changed by the Doppler effect.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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