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Question

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., retina of our eye. Is there a contradiction? [3 MARKS]

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Solution

Each point: 1 Mark

1. When the reflected or refracted rays are divergent, the image is virtual. The divergent rays can be converged on to a screen with the help of suitable converging lens.
2. The convex lens of eyes performs precisely this function. In this case, the ‘virtual image’ serves as the ‘virtual object’, for the lens to produce a real image.
3. It may be noted here that the screen is located at the position of the virtual image. There is no contradiction.


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