Question

Identify the electromagnetic waves whose wavelengths lie in the range
(a) ${10}^{-11}m<\lambda <{10}^{-11}m$,
(b) ${10}^{-4}m<\lambda <{10}^{-6}m$
Write one use of each.

Answer 1

(a) ${10}^{-11}m\lambda <{10}^{-11}m$

X rays have wavelength of these order.

$\to$ X rays are used in medicine and can be used in treatment in form of cancer.

$\to$ X rays are used in photographic film also

(b) ${10}^{-4}m<\lambda <{10}^{-6}m$

Infra red have wavelength of this order.

$\to$ Infrared lamps are used in physical therapy.

$\to$ They also maintain earth's warmth or average temperature through green house effect.

$\to$ Electronic devices also limit infrared like TV, video recorders.