Advertisements
Advertisements
Question
An electromagnetic radiation is used for photography in fog. [2]
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose ?
Advertisements
Solution
(i) Infared radiation.
(ii) They have low frequency, the energy associated with them is also low so they do not scatter much and can penetrate appreciably through it.
RELATED QUESTIONS
Arrange α, β, and γ rays in ascending order with respect to their
1) Penetrating power.
2) Ionising power
3) Biological effect
Name the unit in which the work function of a metal is expressed.
When is said to be the nucleus unstable?
What happens to the atomic number of element when an α -particle is emitted?
What are cathode rays? Why are they called ‘cathode rays’? Name a material which exhibits fluorescence when cathode rays fall on it.
Name the Different Radiations Which Are Emitted by the Radioactive Substances.
Are all the radiations mentioned by you, emitted in a single radioactive decay?
Heavy radioactive elements eventually turn into ______.
What is radioactivity?
Which of the following correctly describes the properties of an alpha particle?
In the discovery of radioactivity, why could the darkening of the covered photographic plate NOT be explained by ordinary visible light?
