$X$-rays are not used for radar purposes because:

  • A
    They are not reflected by the target
  • B
    They are not electromagnetic waves
  • C
    They are completely absorbed by the air
  • D
    They sometimes damage the target

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How are $X-$rays produced?

The minimum wavelength of $X$-rays produced by an $X$-ray tube depends on which of the following?

The $X-$ray beam coming from an $X-$ray tube will be:

If the operating potential of an $X-$ray tube is $50 \text{ kV}$,the velocity of $X-$rays coming out of it is

Hydrogen atom does not emit $X$-rays because

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