I think it's D because sunlight is a solar system
<span>A measurement must include both a number and an unit.
</span>
Answer:
Option B
Explanation:
According to quantum theory of radiation electromagnetic field or electromagnetic radiation( like light) produce by accelerated charge object and the quantum of EM radiations is photon which has discrete energy. So, EM field can have only certain values of total energy and no other value due the discrete nature of the energy of photon. Hence option B is correct
The frequency is
and it is blue light
Explanation:
The relationship between the speed, the frequency and the wavelength of an electromagnetic wave is given by:

where
is the speed of light
f is the frequency of the wave
is its wavelength
In this problem, the wavelength of the wave is

Therefore, its frequency is:

The wavelength of this wave is

And by looking at the table of the wavelengths of the colors, we notice that this corresponds to the blue light, which has a range of wavelength of
[450 - 495] nm
Learn more about waves and electromagnetic waves here:
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