1.

A point source of light S is placed in front of a perfectly reflecting mirror as shown in the figure. S′ is a screen. The intensity at the centre of the screen is found to be I. If the mirror is removed, then the intensity at the centre of the screen would be

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A point source of light S is placed in front of a perfectly reflecting mirror as shown in the figure. S is a screen. The intensity at the centre of the screen is found to be I. If the mirror is removed, then the intensity at the centre of the screen would be




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