Question

A beam of light has a wavelength λ. The light's intensity is reduced without changing the wavelength. Which is true after the intensity is reduced? The photons travel slower. The photons are smaller. The photons have less energy. There are fewer photons per second. The photons have less energy and there are fewer photons per second. Which of the following phenomena is best explained by treating light as a wave? The limited resolution of a light microscope. The threshold frequency in the photoelectric effect experiment. The emission of only certain wavelengths of light by an excited atom. The quantization of energy levels for a particle in a box. The energy of a photon of red light is _______ the energy of a photon of blue light. The same as. Larger than. Smaller than.

          A beam of light has a wavelength λ. The light's intensity is reduced without changing the wavelength. Which is true after the intensity is reduced? 
The photons travel slower.
The photons are smaller.
The photons have less energy.
There are fewer photons per second.
The photons have less energy and there are fewer photons per second.

Which of the following phenomena is best explained by treating light as a wave? 
The limited resolution of a light microscope.
The threshold frequency in the photoelectric effect experiment.
The emission of only certain wavelengths of light by an excited atom.
The quantization of energy levels for a particle in a box.

The energy of a photon of red light is _______ the energy of a photon of blue light. 
The same as.
Larger than.
Smaller than.

Added by Rosario M.

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