Advertisements
Advertisements
प्रश्न
Give one use of electromagnetic radiations in Infrared radiation.
Advertisements
उत्तर
Infrared radiations are used as signals during the war.
संबंधित प्रश्न
Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.
Which part of electromagnetic spectrum is used in radar systems?
X-ray from a Coolidge tube is incident on a thin aluminium foil. The intensity of the X-ray transmitted by the foil is found to be I0. The heating current is increased to increase the temperature of the filament. The intensity of the X-ray transmitted by the foil will be
(a) zero
(b) < I0
(c) I0
(d) > I0
The Kβ X-rays from certain elements are given below. Draw a Moseley-type plot of √v versus Z for Kβ radiation.
| Element | Ne | P | Ca | Mn | Zn | Br |
| Energy (keV) | 0.858 | 2.14 | 4.02 | 6.51 | 9.57 | 13.3 |
-
- Calculate the speed of the wave.
- Name the medium through which it is traveling.
Name two sources of infrared radiation.
Answer briefly.
What is a carrier wave?
X-rays, gamma rays and microwaves travelling in a vacuum have ______.
Light of wavelength `3500A` is incident on two metals A and B whose work functions are 3.2 eV and 1.9 eV respectively. Which metal will emit photoelectrons?
Write two uses of the following radiation.
Gamma rays
