- 1(current)
Q. No.A plane convex lens \((\mu= 1.5)\) has a radius of curvature \(10~\text{cm}\). It is silvered on its plane surface. The focal length of the lens after silvering is:
| 1. | \(10\) cm | 2. | \(20\) cm |
| 3. | \(15\) cm | 4. | \(25\) cm |
Subtopic: Â Lens Makers' Formula |
 61%
Level 2: 60%+
AIPMT - 2000
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A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will:
| 1. | become zero. |
| 2. | become infinite. |
| 3. | become small, but non-zero. |
| 4. | remain unchanged. |
Subtopic: Â Lens Makers' Formula |
 73%
Level 2: 60%+
AIPMT - 2003
Hints
Links
- 1(current)
Q. No.
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