OPTICAL PHENOMENON – Air – DGCA Question Bank For Politics

#1. Aurora Australis occur in the

S hemisphere

N hemisphere

Equator

#2. Aurora Australis called _____ Lights

Northern

Southern

Temperate

#3. Aurora Borealis occur in the

S hemisphere

N hemisphere

Equator

#4. Aurora Borealis are called ______ Lights

Northern

Southern

Temperate

#5. Corona occur in ______ clouds

AS

NS

CS

#6. Bishop's ring is due to the diffraction of light by fine particles of

Water

dust

ice

#7. The radius of the Bishop's ring is about

32°

22°

42°

#8. Superior Mirage occurs marked

Lapse

Isothermal

Inversion

#9. Inferior Mirage occurs when there is

Lapse

Isothermal

Inversion

#10. Corona are formed due to the ______ of light

Refraction

Diffraction

Scattering

#11. Corona are formed due to light, passing through

Mist only

Fog only

small water or ice particles only

Any one of all these

#12. Halo is produced by

Refraction

Diffraction

Scattering

#13. Halo is produced when light passes through

water particles

ice crystals

both

#14. Halo occur in the cloud

AS

NS

CS

#15. Halo is luminous ring of ______ radius

32°

22°

42°

#16. Halo round the sun shows a pure clear _____ on the outside.

Red

Yellow

Violet

#17. Halo signifies predominance in the cloud of

Supercooled water drops

Ice crystals

Both

#18. The cloud which cause Halo has ______ chances of ice accretion

negligible

maximum

medium

#19. Sometimes a halo with a radius of ______ is observed, called Large Halo

32°

42°

22°

#20. Halo occurs from ____ cloud

Low

Medium

High

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