NEET Physics Optical Instruments MCQ Question
A convex lens forms an image at a distance of 30 cm on the opposite side of the object. If the object distance is 10 cm, what is the focal length of the lens?
7.5 cm
15 cm
22.5 cm
30 cm
Correct Answer
Detailed Explanation
Using the lens formula 1/v - 1/u = 1/f, where v = 30 cm and u = -10 cm, we find the focal length f = 7.5 cm.
Found an issue with this question?
Related Questions
More from Optical Instruments
Assertion (A): The thin lens formula is applicable to both convex and concave lenses for real and virtual images. | Reason (R): The focal points of a ...
Match Column-I with Column-II. Column-I Column-II (a) Simple Microscope (i) Used for terrestrial observations (b) Refracting Telescope (...
More from
Consider a diagram where a parallel beam of light is incident on a concave mirror. The reflected rays converge at a point on the principal axis. What ...
The optical density of turpentine is higher than that of water while its mass density is lower. Figure shows a layer of turpentine floating over water...
A 2.5 cm tall object is placed 27 cm in front of a concave mirror with a radius of curvature of 36 cm. At what distance from the mirror will the scree...