NDA 2023 Physics question

Which one of the following statements about X-rays is not true ?

(A)They have wavelengths of about 1 Å.
(B)These can be generated by bombarding a metal target by high energy electrons.
(C)Due to their wavelengths being shorter, these can be used for radar systems.Correct
(D)These are also used for the treatment of certain forms of cancer.

Answer: (C)

Solution

Radar systems use microwaves, not X-rays. X-rays have wavelengths of the order of 1 Å, are produced

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Question ID VK-032382