Optical Phenomena Flashcards

1
Q

Aurora Australis occur In the

A

> (a) S hemisphere
(b) N hemisphere
(c) Equator

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2
Q

Aurora Australis called ……… Lights

A

(a) Northern
>(b) Southern
(c) Temperate

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3
Q

Aurora Borealis occur in the

A

(a) S hemisphere
>(b) N hemisphere
(c) Equator

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4
Q

Aurora Borealis are called ………. Lights

A

> (a) Northern
(b) Southern
(c) Temperate

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5
Q

Corona occur in clouds

A

> (a) AS
(b) NS
(c) CS

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6
Q

Bishop’s ring is due to the diffraction of light by fine particles of

A

a) water
>(b) dust
(c) ice

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7
Q

The radius of the Bishop’s ring is about

A

(a) 32°
>(b) 22°
(c) 42°

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8
Q

Superior Mirage occurs in marked

A

(a)Lapse
(b) Isothermal
>(c) Inversion

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9
Q

Inferior Mirage occurs when there is

A

> (a)Lapse
(b) Isothermal
(c) Inversion

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10
Q

Corona are formed due to the ……. of light

A

(a) Refraction
>(b) Diffraction
(c)Scattering

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11
Q

Corona are formed due to light, passing through

A

(a) Mist only
(b)Fog only
(c) small water or ice particles only
>(d) Any one of all these

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12
Q

Halo is produced by

A

> (a) Refraction
(b) Diffraction
(c)Scattering

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13
Q

Halo is produced when light passes through

A

(a) water particles
>(b) ice crystals
(c)both

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14
Q

Halo occur in the cloud

A

(a) AS
(b) NS
>(c) CS

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15
Q

Halo is luminous ring of ……. radius

A

(a) 32°
>(b) 22°
(c) 42°

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16
Q

Halo round the sun shows a pure clear

A

> (a)Red
(b) Yellow
(c) Violet

17
Q

Halo signifies predominance in the cloud of

A

(a) Supercooled water drops
>(b) Ice crystals
(c) Both

18
Q

The cloud which cause Halo has …….. chances of ice accretion

A

> (a) negligible
(b) maximum
(c)medium

19
Q

Sometimes a halo with a radius of …….. is observed, called Large Halo

A

(a) 32°
>(b) 42°
(c) 22°

20
Q

Halo occurs from ……. cloud

A

(a) Low
(b) Medium
>(c) High