Physics
Holography is a technique of

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

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Physics
Energy in reflected light :

Becomes maximum for angle of incidence equal to 45°
Does not depends on the angle of incidence
Decreases with the increase in angle of incidence
Increases with the increase in angle

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Physics
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

at the top of Mt. Everest
in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
at a place in a valley below sea level
at sea level

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