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Physics

Physics
Lens is made up of which glass

Pyrex glass
Flint glass
Cobalt glass
Ordinary glass

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Physics
The energy emitted by the Sun is due to

Nuclear fusion
All of these
Chemical reaction
Nuclear fission

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Physics
Energy travels from Sun to Earth through

Radiation
Modulation
Convection
Conduction

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Physics
Heat energy is transferred by conduction whenever molecules

Means of photons
Collide each other
Particles replaces there places
All of these

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Physics
Choose the most appropriate answer: In which atmospheric layer are the communication satellites located?

Mesosphere
Stratosphere
Troposphere
Ionosphere

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Physics
Which of the following is not caused by atmospheric refraction of light ?

Twinkling of stars at night
Sun appearing higher in the sky than it actually is
Sun becoming visible two or three minutes before actual sunrise
Sun appearing red at sunset

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