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प्रश्न
State three properties of ultra-violet radiation similar to visible light.
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उत्तर
(i) Ultra-violet radiations can travel in vacuum as the visible light can do, with the speed 3 × 108 ms−1.
(ii) Both the ultra-violet radiations and the visible light are electromagnetic waves.
(iii) Both the ultra-violet radiations and the visible light obey the laws of reflection and refraction.
संबंधित प्रश्न
What is the range of the wavelength of the following electromagnetic waves?
(a)X-rays,
State the approximate range of wavelength associated with infrared rays.
Name the waves produced by the changes in the nucleus of an atom.
Name of physical quantity which remains same for microwaves of wavelength 1 mm and UV radiations of 1600 Å in vacuum.
Characteristic X-rays may be used to identify the element from which they are being emitted. Can continuous X-rays be used for this purpose?
The energy of a photon of a characteristic X-ray from a Coolidge tube comes from
Answer briefly.
Can we produce a pure electric or magnetic wave in space? Why?
Identify the part of the electromagnetic spectrum which:
- produces the heating effect.
- is absorbed by the ozone layer in the atmosphere.
- is used for studying crystal structure.
Write any one method of the production of each of the above radiations.
Below is an incomplete table showing the arrangement of electromagnetic spectrum in the increasing order of their wavelength. Complete the table:
| Gamma ray | X - ray | UV rays | Visible rays | Infrared | A | Radio waves |
- Identify the radiation A.
- Name the radiation used to detect fracture in bones.
- Name one property common to both A and Radio waves.
