Question

Which of the following will be used to obtain point sized,real and inverted image when an object is kept

at infinity? (1)

(a) Concave mirror and lens

(b) Convex mirror and concave lens

(c) Concave mirror and convex lens. (d) Convex mirror and lens.​

Answer 1

Answer:

real, enlarged and inverted image can be obtained by using a concave mirror.

Answer 2

First of all you have mentioned the wrong subject .. you have mentioned Maths but it's Physics so please ask Correct Subject ..

When rays of light coming from infinity are incident on a concave mirror, convex mirror, concave lens or a convex lens, a highly diminished image is formed at the focus as shown in the figure.

When rays of light coming from infinity are incident on a concave mirror, convex mirror, concave lens or a convex lens, a highly diminished image is formed at the focus as shown in the figure.The same can be verified by using mirror equation and lens equation.

Substituting u=−∞,v=f

Substituting u=−∞,v=fMagnification m=v/u=f/∞=0

Substituting u=−∞,v=fMagnification m=v/u=f/∞=0Hence, image is point sized.

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