Physics

Grade-10

Easy

Question

# The ray diagram below shows the image formation by a convex lens. Which of the following is true about different measurements?

- f, u and v are all negative.
- f, u and v are all positive.
- f and u are negative, and v is positive.
- f and v are negative, and u is positive.

Hint:

- Distances that are calculated in the orientation of the incident ray are positive and the distances calculated in the direction opposite to the incident rays are negative.

## The correct answer is: f and u are negative, and v is positive.

- According to the spherical lens, the sign convention is as follows:
- Distances that are calculated in the orientation of the incident ray are positive and the distances calculated in the direction opposite to the incident rays are negative.
- Focal length of convex lens is positive.
- Here Object are opposite to direction of Incident Ray hence u is negative and v is positive because image is along the direction of incident ray

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