Physics
A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of ________ .

Gravitational force between train and man
Pressure difference due to fast moving air in between
The centripetal force
Illusion of the man

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Physics
Holography is a technique of

Recording a permanent three dimensional black and white 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 multicolour photograph

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