1.
Aurora Australis occur in the
a.
S hemisphere
b.
N hemisphere
c.
Equator
2.
Aurora Australis called ....
Lights
a.
Northern
b.
Southern
c.
Temperate
3.
Aurora BoreaKs occur in the
a.
S hemisphere
b.
N hemisphere
c.
Equator
4.
Aurora Borealis are called Lights
a.
Northern
b.
Southern
c.
Temperate
5.
Corona
a.
AS
b.
NS
c.
CS
6.
Bishop's ring is due to the
diffraction of light by fine particles of
a.
water
b.
dust
c.
ice
7.
The radius of the Bishop's ring
is about
a.
32°
b.
22°
c.
42°
8.
Superior Mirage occurs in
marked
a.
Lapse
b.
Isothermal
c.
Inversion
9.
Inferior Mirage occurs when
there is
a.
Lapse
b.
Isothermal
c.
Inversion
10. Corona
a.
Refraction
b.
Diffraction
c.
Scattering
11. Corona
a.
Mist only
b.
Fog only
c.
small water or ice particles
only
d.
Any one of all these
12. Halo is produced by
a.
Refraction
b.
Diffraction
c.
Scattering
13. Halo is produced when light passes through
a.
water particles
b.
ice crystals
c.
both
14. Halo occur in the cloud
a.
AS
b.
NS
c.
CS
15. Halo is luminous ring of radius
a.
32°
b.
22°
c.
42°
16. Halo round the sun shows a pure clear on the outside
a.
Red
b.
Yellow
c.
Violet
17. Halo signifies predominance in the cloud of
a.
Supercooled water drops
b.
Ice crystals
c.
Both
18. The cloud which cause Halo has ... chances of ice accretion
a.
negligible
b.
maximum
c.
medium
19. Sometimes a halo with a radius of is
observed, called Large Halo
a.
32°
b.
42°
c.
22°
20. Halo occurs from.... cloud
a.
Low
b.
Medium
c.
High
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