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Q.

Which one of the following statements are correct?

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a

X-rays are suitable for radar system and aircraft navigation

b

Microwaves are produced in Coolidge tube

c

Water molecules readily absorb infrared radiation and their thermal motion increases.

d

Gamma radiations generate due to electron transitions between upper and lower energy levels of heavy element when excited by electron bombardment

answer is B.

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Detailed Solution

Water molecules readily absorb infrared radiation and their thermal motion increases and therefore, they heat their surroundings.

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