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Uses of Radioactivity

Electromagnet...

Question

Electromagnetic radiation used to sterilise milk is

A

X-ray

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B

γ

-ray

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C

UV rays

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D

Radiowaves

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Solution

The correct option is C UV rays
Ultra violet rays are used to sterilise milk as their wavelengths are shorter than visible rays and at small wavelengths they can break molecular bonds within DNA of bacteria (present in milk) thereby killing or disabling them.

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Q. Assertion (A) : γ-rays have very high penetrating power.
Reason (R) : γ-rays are high-energy electromagnetic radiations.

γ -

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γ

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Q. Which of the following statements is/are correct?
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