Advertisements
Advertisements
Question
A stick partly immersed in water appears to be bent. Draw a ray diagram to show the bending of the stick when placed in water and viewed obliquely from above.
Solution
APPEARS IN
RELATED QUESTIONS
Calculate the focal length of a corrective lens having power +2.5 D.
(a) At what distance should the lens be held from the figure in order to view the squares distinctly with the maximum possible magnifying power?
(b) What is the magnification in this case?
(c) Is the magnification equal to the magnifying power in this case? Explain.
The focal length of a convex lens is 25 cm. What is its power?
Define the term focal length of a lens.
How does focal length of a lens change when red light incident on it is replaced by violet light? Give reason for your answer.
The power of a lens is +2.0 D. Find its focal length and state the kind of lens.
The following diagram shows the object O and the image I formed by a lens. Copy the diagram and on it mark the positions of the lens LL’ and focus (F). Name the lens.
The power of the magnifying glass depends on the distance of the magnifying glass from object.
Find the power of a convex lens of focal length of + 25 cm.
Assertion and reasoning type
- Assertion: Myopia is due to the increase in the converging power of eye lens.
- Reason: Myopia can be corrected with the help of concave lens.