Question : Which one of the following can be used to distinguish between the sounds of a note played on piano and violin?
Correct Answer: C
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Question : Which of the following properties proves that light behaves as waves I. Interference II. Diffraction III. Refraction
Correct Answer: D
Question : Which one of the following properties of light does not depend upon the nature of the medium?
Question : Polaroid can be used
Question : A lens which is thicker in the middle and thinner at the edge is called
Correct Answer: B
Question : A straight line passing through center of curvature of the two spherical surfaces of a lens is called
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