Atmospheric Refraction

The colored light that refracts most while passing through a prism is

• Red

• Yellow

• Blue

• Violet

The change in focal length of an eye tens is caused by the action of the

• retina

• pupil

• ciliary muscles

• iris

Refraction of light by the earth’s atmosphere due to variation in air density is called

• atmospheric reflection

• atmospheric dispersion

• atmospheric scattering

• atmospheric refraction

One cannot see through the fog, because

• refractive index of the fog is very high

• fog absorbs light

• light is scattered by the droplets

• light suffers total reflection at droplets

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light

• is scattered the most by smoke or fog

• is absorbed the most by smoke or fog

• is scattered the least by smoke or fog

• moves fastest in air

Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?

• Rainbow

• Twinkling of stars

• Advanced sunrise and delayed sunset

• Stars seem higher than they actually are

Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

• Dispersion of light

• Scattering of light

• Total internal reflection of light

• Reflection of light from the earth

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Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

• Dispersion of light

• Scattering of light

• Total internal reflection of light

• Reflection of light from the earth

  View Answer

When a white light falls on a triangular prism, the colour of light which will deviate the least is

• violet

• green

• blue

• red

Formation of rainbow is due to..........

• refraction of light

• scattering of light

• dispersion of light

• atmospherics refraction