Physics
'Mirage' is an example of

Dispersion of light only
Refraction of light only
Refraction and total internal reflection of light
Total internal reflection of light only

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Physics
Holography is a technique of

Recording a permanent three dimensional photograph of a given single colour or a multicolour
Recording a permanent three dimensional multicolour photograph
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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