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Question

Find out the electromagnetic radiation which has the longest wavelength?

A
Gamma rays
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B
Ultraviolet
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C
Blue light
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D
X-rays
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E
Orange light
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Solution

The correct option is B Orange light
The gamma ray has lowest wavelength less than 0.01nm, Ultraviolet has in between 10nm100nm, X-rays has range 0.0110nm, blue light has wavelength around 475 nm and orange has around 593 nm. Thus, orange light has longest wavelength.

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