(A) Sound intensity
(B) Light intensity
(C) Power of a lens
(D) None of the above
Author:
A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers?
(A) Diffraction
(B) Refraction
(C) Reflection
(D) Total internal reflection
Which among following waves can not be transmitted through vacuum?
(A) Electromagnetic
(B) Heat
(C) Sound
(D) Light
The phenomenon of light associated with the appearance of blue colour of the sky is?
(A) Refraction
(B) Reflection
(C) Interference
(D) Scattering
Which layer of the earth atmosphere reflect back the radio waves to earth surface?
(A) Stratosphere
(B) Ionosphere
(C) Mesosphere
(D) Exosphere
Coolis tube is used to produce?
(A) Gama rays
(B) X-rays
(C) Micro waves
(D) Radio waves
Remote sensing device has an inbuilt source of?
(A) Ultraviolet ray
(B) Infrared ray
(C) g-ray
(D) X-ray
Which apparatus is used to locate a submerged object?
(A) Quasar
(B) Pulsar
(C) Radar
(D) Sonar