A convex lens is placed over a plane mirror. A pin is now positioned so
that there is no parallax between the pin and its image formed by this
lens-mirror combination. How can this observation be used to find the
focal length of the convex lens? Give appropriate reasons in support of
your answer.

Question

Anashwara Jayadas · Answer

Image is formed at the focus of the lensThe image coincided with the object itself an the rays from the object after refraction from the lens fall normally on the mirror forms an image coinciding with the object itself.

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A convex lens is placed over a plane mirror. A pin is now positioned so that there is no parallax between the pin and its image formed by this lens-mirror combination. How can this observation be used to find the focal length of the convex lens? Give appropriate reasons in support of your answer.

A convex lens is placed over a plane mirror. A pin is now positioned so
that there is no parallax between the pin and its image formed by this
lens-mirror combination. How can this observation be used to find the
focal length of the convex lens? Give appropriate reasons in support of
your answer.

1 Answers

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A convex lens is placed over a plane mirror. A pin is now positioned so that there is no parallax between the pin and its image formed by this lens-mirror combination. How can this observation be used to find the focal length of the convex lens? Give appropriate reasons in support of your answer.

A convex lens is placed over a plane mirror. A pin is now positioned so that there is no parallax between the pin and its image formed by this lens-mirror combination. How can this observation be used to find the focal length of the convex lens? Give appropriate reasons in support of your answer.

1 Answers

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A convex lens is placed over a plane mirror. A pin is now positioned so
that there is no parallax between the pin and its image formed by this
lens-mirror combination. How can this observation be used to find the
focal length of the convex lens? Give appropriate reasons in support of
your answer.