Physics
Grade-10
Easy
Question
The ray diagram below shows a case of the image formation by a convex lens. Here the object distance is ____, and the image distance is _____.
- Positive, positive
- Positive, negative
- Negative, positive
- Negative, negative
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: Negative, 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.
- Here we have an object kept on one side of a converging lens, the image object will be beyond the lens from the actual object and will be inverted. In the same way with the focal point, if the image is on the opposite side of the lens from the object, the distance from the lens to the image is positive.
- Here the object distance is __Negative__, and the image distance is __Positive___.
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A convex lens is of radius of curvature 104 cm. A parallel beam of light shone on the lens converges to a point at a distance of ____ cm from the optic center.
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