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प्रश्न
State the condition for the following a ray passes undeviated through the lens .
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उत्तर
If a ray passes undeviated through the lens it is incident at the optical centre of the lens.
संबंधित प्रश्न
What does sign of power (+ve or –ve) indicate?
State power of a lens S.I. unit.
Find the focal length of a lens of power −2.0 D. What type of lens is this?
What is the power of a convex lens of focal length 0.5 m?
What is the unit of power of a lens? Define the unit of power of a lens.
On reducing the focal length of a lens, its power ______.
Surabhi from std. X uses spectacle. The power of the lenses in her spectacle is 0.5 D.
Answer the following questions from the given information:
- Identify the type of lenses used in her spectacle.
- Identify the defect of vision Surabhi is suffering from.
- Find the focal length of the lenses used in her spectacle.
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.
The power of the magnifying glass depends on the distance of the magnifying glass from object.
An object is placed in front of a converging lens. Obtain the conditions under which the magnification produced by the lens is
- negative and
- positive.
