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Can X-rays Be Polarised?

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प्रश्न

Can X-rays be polarised?

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उत्तर

Only transverse waves can be polarised. Since an X-ray is a transverse wave, it can be polarised.

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 44: X-rays - Short Answers [पृष्ठ ३९३]

APPEARS IN

एचसी वर्मा Concepts of Physics Volume 1 and 2 [English]
अध्याय 44 X-rays
Short Answers | Q 4 | पृष्ठ ३९३

संबंधित प्रश्न

Why are microwaves considered suitable for radar systems used in aircraft navigation?


Name the phenomenon which shows the quantum nature of electromagnetic radiation.


State an additional use of the X-rays waves


What do you understand by the statement, "Electromagnetic waves transport momentum"?


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A wave has a wavelength of 10-3 nm. Name the wave.


What is the range of the wavelength of the following electromagnetic waves?
(a) Gamma rays.


What are ultraviolet radiations?


Why is exposure to X-rays injurious to health but not exposure to visible light, when both are electromagnetic waves?


The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation,
(a) the intensity increases
(b) the minimum wavelength increases
(c) the intensity remains unchanged
(d) the minimum wavelength decreases.


An X-ray tube operates at 40 kV. Suppose the electron converts 70% of its energy into a photon at each collision. Find the lowest there wavelengths emitted from the tube. Neglect the energy imparted to the atom with which the electron collides.

(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)


What is the velocity of electromagnetic wave?

Give two properties of ultraviolet radiations which differ from the visible light.

Name the radiation of the electromagnetic spectrum which is used for the following:

Radar and Give the frequency range.


Give one use of electromagnetic radiation in Ultraviolet radiation.


Answer briefly.

Give two uses of radio waves.


Why does microwave oven heats up a food item containing water molecules most efficiently?


In an atom X, electrons absorb the energy from an external source. This energy “excites” the electrons from a lower-energy level to a higher-energy level around the nucleus of the atom. When electrons return to the ground state, they emit photons.

The figure below is the energy level diagram of atom X with three energy levels, E1 = 0.00eV, E2 = 1.78eV and E3 = 2.95eV. The ground state is considered 0 eV for reference. The transition of electrons takes place between levels E1 and E2.

  1. What wavelength of radiation is needed to excite the atom to energy level E2 from E1?
  2. Suppose the external source has a power of 100 W. What would be the rate of photon emission?

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