World Geography
The umbra is

None of these
the inner portion of the moon's shadow
both (a) and (b)
formed by tangents to the sun and moon

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World Geography
Which among the following principle is used by Bats?

law of diffraction
law of reflection
RADAR (Radio Detective & Ranging
SONAR (Sound Navigation & Ranging

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World Geography
Which among the following statements is/are correct about the constituents of the atmosphere?Higher concentration of dust particles is found in the sub tropical and temperate regions.Amount of water vapour decrease with altitudeSelect the correct code from the options given below:

Neither 1 & 2
Only 1
Both 1 & 2
Only 2

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