Question

The metal used for making X-Ray window is:
A.${\text{Mg}}$
B.${\text{Na}}$
C.Ca
D.${\text{Be}}$

Answer 1

To answer this question, you should recall the concept of X-Ray Radiography and x-ray windows. X-rays are produced by bombarding cathode rays on radioactive metals.

Complete step by step answer:
They are produced when high-velocity electrons collide with the metal plates, thereby giving the energy as the X-Rays and themselves absorbed by the metal plate.
The X-Ray beam travels through the air and comes in contact with the body tissues, and produces an image on a metal film.
Soft tissue like organs and skin, cannot absorb the high-energy rays, and the beam passes through them.
Dense materials inside our bodies, like bones, absorb the radiation.
Much like a camera, the X-Ray film develops depending on the areas which were exposed to the X-Rays. White areas show the denser tissues, such as bones which have absorbed the X-Rays whereas black areas on an X-Ray represent areas where the X-Rays have passed through soft tissues.
In a normal X-ray machine, X-rays are produced by bombarding cathode rays on radioactive material. When a high-speed cathode-ray falls on radioactive material, there is an emission of electrons and energy. This energy is used in the X-ray machine. The only metal which shows radioactivity in one of its isotopes in the given question is beryllium.

Hence, the correct option is option D.

Note:
Properties of X-Rays: The X-Rays properties are given below:
They have a shorter wavelength of the electromagnetic spectrum.
Requires high voltage to produce X-Rays.
They are used to capture human skeleton defects.
They travel in a straight line and do not carry an electric charge with them.
They are capable of travelling in a vacuum.
-Rays Uses: Since the discovery of X-radiation, they are used in various fields and for various purposes. Some key uses of X-Ray are given below:
Medical Science
Security
Astronomy
Industry
Restoration