Physics
The magnifying power of an astronomical telescope can be decreased by

Decreasing the focal length of the eyepiece
None of these
Increasing the focal length of the eyepiece
Increasing the focal length of the objective

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Physics
Rain drops fall from great height. Which among the following statements is true regarding it?

They fall with that ultimate velocity, which are different for different droplets
They fall with same ultimate velocity
Their velocity increases and they fall with same velocity on the earth
Their velocity increases and they fall with different velocity on the earth

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Physics
Holography is a technique of

Recording a permanent three dimensional black and white photograph
Recording a permanent, sharp two diimensional black and white or multicolour photograph
Recording a permanent three dimensional multicolour photograph
Recording a permanent three dimensional photograph of a given single colour or a multicolour

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