Question

Which part of sunlight makes up the visible spectrum? Check all that apply.
(A) Blue
(B) Green
(C) Indigo
(D) infrared
(E) ultraviolet

Answer 1

Hint: In order to solve this question, we should know that the spectrum of many electromagnetic radiations arranged accordingly to their wavelength ranges and properties together called electromagnetic spectrum, and those radiations which makes us enable to see falls in one category according to their wavelength range and such part of electromagnetic spectrum is known as visible spectrum. Here, we will discuss the complete electromagnetic spectrum and later decide which of the given rays falls under the category of visible spectrum.

Complete Step By Step Answer:
Let us first know about each part of the electromagnetic spectrum which are listed according to their wavelength ranges.
Gamma rays whose wavelength lies in the region of $ {10^{ - 9}}nm - {10^{ - 6}}nm $
Ultraviolet rays whose wavelength lies in the region of $ 1nm - 100nm $
Infrared rays whose wavelength is $ 10000nm $
Visible spectrum whose wavelength lies in the region of $ 400nm - 700nm $
Radio waves whose wavelength lies in the region of $ 100m - 100Km $
Microwave whose wavelength lies in the region of $ 1cm - 10cm $
We know that colours like blue, green and indigo are the colours which can be seen by our eyes and all these colour rays lie in the region of the visible spectrum while infrared and ultraviolet rays are not seen by our eyes because their wavelengths don’t lie in the visible range spectrum.
Hence, the correct options are (A)Blue (B) Green (C) Indigo.

Note:
It should be noted that, one should remember the wavelength ranges of each part of the electromagnetic spectrum and visible spectrum consists of all the seven colours of white light which are visible to our eyes and mathematically the exact wavelength of these colours are Blue $ (400nm) $ Green $ (550nm) $ and Indigo $ (425nm - 450nm) $ respectively.