The color filter that a person need to choose is option (a) blue.
Why choose the blue color?
The reduction of the wavelength of the light is one that tends to make the aperture to be bigger if it is said to be relative to the light wavelength, by rising the resolving power. So, one need to choose a blue filter.
The Blue light filter is one that can act by lowering the amount of blue light that is shown on the screen of telescope device.
note that the blue light can tends to suppress the creation of melatonin thus making it to be filtering it out.
Therefore, based on the above, The color filter that a person need to choose is option (a) blue.
Learn more about color filter from
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