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प्रश्न
Name the phenomenon which shows the quantum nature of electromagnetic radiation.
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उत्तर
Photoelectric effect is the phenomenon which shows the quantum nature of electromagnetic radiation.
संबंधित प्रश्न
Name the parts of the electromagnetic spectrum which is
used to treat muscular strain.
Write in brief, how these waves can be produced.
If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now?
Name two sources, each of infrared radiations and ultraviolet radiations.
Can X-rays be used for photoelectric effect?
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.
Answer briefly.
Name the most harmful radiation entering the Earth's atmosphere from outer space.
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?
A car is moving towards a high cliff. The car driver sounds a horn of frequency f. The reflected sound heard by the driver has a frequency 2f. If v be the velocity of sound, then the velocity of the car, in the same velocity units, will be:
