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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