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प्रश्न
Write two uses of the following radiation.
X-rays
Give any two uses of X-rays.
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उत्तर
- X-rays are used in medical diagnostics to find bone fractures, lung TB, gall bladder stones, and kidney stones.
- They are employed in engineering to inspect bridge defects.
- To inspect industrial materials for cracks or defects.
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संबंधित प्रश्न
How are infrared waves produced?
Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs.
(a) 21 cm (wavelength emitted by atomic hydrogen in interstellar space).
(b) 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift).
(c) 2.7 K [temperature associated with the isotropic radiation filling all space-thought to be a relic of the ‘big-bang’ origin of the universe].
(d) 5890 Å - 5896 Å [double lines of sodium]
(e) 14.4 keV [energy of a particular transition in 57Fe nucleus associated with a famous high resolution spectroscopic method (Mössbauer spectroscopy)].
State Moseley's law
Is it possible that in a Coolidge tube characteristic Lα X-rays are emitted but not Kα X-rays?
The Kβ X-ray of argon has a wavelength of 0.36 nm. The minimum energy needed to ionize an argon atom is 16 eV. Find the energy needed to knock out an electron from the K shell of an argon atom.
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- Calculate the speed of the wave.
- Name the medium through which it is traveling.
To which regions of the electromagnetic spectrum do the following wavelengths belong:
(a) 250 nm
(b) 1500 nm
Name the radiation of the electromagnetic spectrum which is used for the following:
To photograph internal parts of the human body and Give the frequency range
Give any two uses of infrared waves.
