Light, Heat, Thermodynamics, Wave Motion, Sound, Optics & Oscillations - Category Wise Question And Answer Practice Test With Solutions

Question : 1

The sun is seen before the actual sunrise because of

a) scattering of light

b) reflection

c) refraction

d) rectilinear propagation of light

Question : 2

At 0°C a body emits

a) only microwave radiation

b) no radiation

c) only visible light

d) all wavelengths.

Question : 3 [UPPCS (Pre) 2015]

Blue colour of the sky is due to

a) Interference of light

b) Dispersion of light

c) Scattering of light

d) Emission of more blue light as compared to other colours by the Sun

Question : 4 [MPPCS (Pre) 2005]

Three colours are the primary colours. These are

a) Yellow, Green and Red

b) Blue, Green and Red

c) Blue, Yellow and Red

d) Blue, Yellow and Red

Question : 5 [UPPCS (Pre) 2011]

Retina of the eye is comparable to which of the following parts of a traditional camera?

a) Shutter

b) Lens

c) Film

d) Cover