UPSC NDA I 2023 General Ability Solved Paper

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Question : 91 of 150

Marks: +1, -0

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

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

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