Physics
The instrument used to see the distant objects on the Earth is

Simple microscope
Terrestrial telescope
Compound microscope
Astronomical telescope

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Physics
Lightning is produced when

Strong opposite charges in different clouds break down the resistance offered by the intervening air
Clouds strike against impurities in air and the friction burns up these impurities
Similar charges of electricity rush towards each other and then get repelled
Water vapour produces electricity in the clouds

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