To distinguish between real gems and artificial gems a merchant may use which of the following radiations?
A
Infrared rays
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B
γ-rays
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C
X-rays
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D
Ultraviolet rays
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Solution
The correct option is A Infrared rays To distinguish between real gems and artificial gems a merchant may use infrared radiations. A number of synthetic gems can be distinguished from their natural counterparts by differences in their infrared spectra.