Question

The energy of a wave will remain constant if which of the following changes are made to it?AThe wavelength is cut in half, and the speed is doubled.BThe wavelength is doubled, and the amplitude is tripled.CThe wavelength is cut in half, and the speed is tripled.DThe wavelength is doubled, and the speed is also doubled

Answer 1

The energy of a wave will remain constant if which of the following changes are made to it is given below

Explanation:

1.In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels. In water waves, energy is transferred through the vibration of the water particles.

2.First of all for light which is a electromagnetic wave c=frequency*wavelength. As the wavelength increases the frequency decreases. This can be physically understood as the increase in red shift of the light. Also energy =h*frequency,hence increasing wavelength decreases the energy carried by the photon.

3.Wave frequency is related to wave energy. the more energy in a wave, the higher its frequency. The lower the frequency is, the less energy in the wave.