A student obtained a sharp inverted image of a distant tree on a screen placed in front of a concave mirror. He then removed the screen and tried to look into the mirror. He would now see:

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A very blurred image on the wall opposite to the mirror

An erect and magnified image of the tree in the mirror

No image as the screen has been removed

A highly diminished inverted image of the tree at the focus of the mirror

answer is D.

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Detailed Solution

Concept- At its focus, a concave mirror generates a very reduced inverted actual image of a distant object. This true image can only be seen on a computer screen. In this situation, a person's eyes can also work as a screen because the retina inside the eye functions similarly to a screen.
When an object is held a long distance away from a concave mirror, a severely reduced, inverted actual image of the object forms at the mirror's focus. On a screen, this true image can be obtained.
Because the tree is so far away from the concave mirror in this example, a crisp, much reduced, inverted, actual image is generated at the focus that the student obtains on the screen.
Even if he removes the screen and looks into the mirror from the same point where the screen was previously (that is, at the focus), he will see an image. This is because the observer's eyes will behave similarly to a screen. The retina inside the eye functions similarly to a material screen.
As a result, the learner will be able to view a significantly reduced inverted image of the tree at the mirror's focus.
As a result, the proper option is a substantially reduced inverted image of the tree in the mirror's focus.
Hence, the correct option is 4.

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