MCQ
How many colours comprises white light?
- AInfinite
- ✓Seven
- CThree
- DFourteen
✓
Answer
Correct option: B.
Seven
White light comprises of seven colours $-$ Violet, Indigo, Blue. Green, Yellow, Orange, Red.
So, when white light consisting of seven colors falls on a transparent medium $($glass prism$),$ each color in it is refracted $($or deviated$)$ by a different angle, with the result that seven colors are spread out to form a spectrum, The red color is deviated least, so it forms the upper part of the spectrum.
On the other hand, violet color is deviated the maximum, so violet appears at the bottom of the spectrum.
So, when white light consisting of seven colors falls on a transparent medium $($glass prism$),$ each color in it is refracted $($or deviated$)$ by a different angle, with the result that seven colors are spread out to form a spectrum, The red color is deviated least, so it forms the upper part of the spectrum.
On the other hand, violet color is deviated the maximum, so violet appears at the bottom of the spectrum.
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