iPods and MP3's

PLEASE HELP!!! - INTENSITY OF LIGHT IN A MIRROR?

In the figure below, an isotropic point source of light S is positioned at distance d from a viewing screen A and the light intensity IP at point P (level with S) is measured. Then a plane mirror M is placed behind S at distance d. By how much is IP multiplied by the presence of the mirror?

1+ (1/3)^2 = 1.11

HOW TO APPLY MIRROR SCREEN PROTECTOR on HTC TOUCH HD

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