c may move toward the mirror if the mirror is concave d must move toward the mirror if the mirror is convex 8 A real point

Question

c may move toward the mirror if the mirror is concave d must move toward the mirror if the mirror is convex 8 A real point source is 5 cm away from a plane mirror whose reflecting ability is 50 while the eye of an observer pupil diameter 5 mm is 10 cm away from the mirror Assume that both source and eye are on the same line perpendicular to the surface and refracted rays have no effect on intensity Then a the area of the mirror used in observing the image of source is 257 36 mm b the area of the mirror used in observing the image of source is 25 mm c the ratio of the intensities of light as received by the observer in the presence to that in the absence of mirror is 10 9 d the ratio of the intensities of light as received in the

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