Electromagnetic waves of wavelengths `lambda_1, lambda_2 and lambda_3` are used in radar systems, in water purifiers and in remote switches of TV, respectively. (i) Identify the electromagnetic waves, and (ii) Write one source of each of them.

Two sound waves of wavelengths lambda_(1) and lambda_(2) (lambda _(2) gt lambda_(1)) produces n beats//s , the speed of sound is

If lambda_(1) and lambda_(2) are the wavelength of characteristic X - rays and gamma rays respectively , then the relation between them is

Electromangnetic waves with wavelength (i) lambda_1 is used in satellite communication. (ii) lambda_2 used to kill germs in water purifier. lambda_ used to detect leakage of oil in underground pipelines. lambda_4 used to improve visibility in runways during fog and mist conditions. (a) Identify and name the part of e.m. spectrum to which these radiations belong. (b) Arrange these wavelengths in ascending order of their magnitude. (c) Write one more application of each.

Electromagnetic wave with wavelength (i) lambda_1 are used to treat muscular strain (ii) lambda_2 are used by a FM radio station for broadcasting. (iii) lambda_3 are used to detect fracture in bones (iv) lambda_4 are absorbed by the ozone layer of the atmosphere. Identify and name the part of elctromagnetic spectrum to which thest radiations belongs. Arrange these wavelengths in decreasing order of magnitude.

The wavelength of the short radio waves, microwaves, ultraviolet waves are lambda_(1),lambda_(2) and lambda_(3) , respectively, Arrange them in decreasing order.

Which electromagnetic waves are used for the following purposes? (i) Diagnostic tool in medicine. (ii) Kill germs in water purifiers. (iii) Cellular phones. (iv) In remote switches of household electronic systems.

The wavelength of electron waves in two orbits (lambda_(1) : lambda_(2))