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Give One Use of Electromagnetic Radiation in Microwaves.

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प्रश्न

Give one use of electromagnetic radiation in Microwaves.

एक पंक्ति में उत्तर
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उत्तर

Microwaves are used for communication.

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अध्याय 2: Light - Frequently Asked Questions in Board Examination [पृष्ठ १५२]

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फ्रैंक Physics Part 2 [English] Class 10 ICSE
अध्याय 2 Light
Frequently Asked Questions in Board Examination | Q 15. (a) | पृष्ठ १५२

संबंधित प्रश्न

What physical quantity is the same for X-rays of wavelength 10−10 m, red light of wavelength 6800 Å and radiowaves of wavelength 500 m?


Can a hydrogen atom emit characteristic X-rays?


If the potential difference applied to the tube is doubled and the separation between the filament and the target is also doubled, the cutoff wavelength


The X-ray beam emerging from an X-ray tube


Visible light passing through a circular hole forms a diffraction disc of radius 0.1 mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be


Heat at the rate of 200 W is produced in an X-ray tube operating at 20 kV. Find the current in the circuit. Assume that only a small fraction of the kinetic energy of electrons is converted into X-rays.


Give one use of electromagnetic radiation in Ultraviolet radiation.


Choose the correct option.

How does the frequency of a beam of ultraviolet light change when it travels from air into glass?


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?

Which part of the electromagnetic spectrum can the human eye detect?


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