Question

Name the radiations :
(i) That are used for photography at night.
(ii) Used for detection of fraction in bones.
(iii) Whose wavelength range is from $100\mathring{A}$ to $4000\mathring{A}$ (or $10nm$ to $400nm$).

Answer 1

(i) Infrared radiations are used for photography at night.
(ii) X-rays are used for detection of fraction in bones.
(iii) Ultraviolet radiations are having the wavelength range from $100\mathring{A}$ to $4000\mathring{A}$ (or $10nm$ to $400nm$).