We know that plane and convex mirrors produce virtual images of objects. Can they produce real images under some circumstances? Explain.

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Solution

Rays converging to a point ‘behind’ a plane or convex mirror are reflected at the point in front of the mirror on the screen. In other words, a plane or convex mirror can produce a real image if the object is a virtual.

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5. We know that plane and convex mirrors produce virtual images of objects. Can they produce real images under some circumstances? Explain. [5 MARKS]

Q. Assertion : Plane and convex mirrors can produce real images of objects.
Reason : A plane or convex mirror can produce a real image, if the object is virtual.

Choose the correct one out of the given responses.

Q. Assertion :We cannot produce a real image by plane or convex mirrors under any circumstances. Reason: If image distance of a real object in front of a convex mirror is taken as negative, then the focal length of a convex mirror is taken as positive.

Q. Answer the following questions:

(a) You have learnt that plane and convex mirrors produce virtual images of objects. Can they produce real images under some circumstances? Explain.

(b) A virtual image, we always say, cannot be caught on a screen. Yet when we see a virtual image, we are obviously bringing it on to the screen (i.e., the retina) of our eye. Is there a contradiction?

(c) A diver under water, looks obliquely at a fisherman standing on the bank of a lake. Would the fisherman look taller or shorter to the diver than what he actually is?

(d) Does the apparent depth of a tank of water change if viewed obliquely? If so, does the apparent depth increase or decrease?

(e) The refractive index of diamond is much greater than that of ordinary glass. Is this fact of some use to a diamond cutter?

Q. Convex mirrors produce virtual images only.

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