- 1(current)
Q. No.A biconvex lens (μ=1.5) has a radius of curvature of magnitude 20 cm. Which one of the following options, best describes, the image formed by an object of height 2 cm placed 30 cm from the lens?
| 1. | virtual, upright, height =0.5 cm |
| 2. | real, inverted, height =4 cm |
| 3. | real, inverted, height =1 cm |
| 4. | virtual, upright, height =1 cm |
Subtopic: Lenses | Lens Makers' Formula | Refraction at Curved Surface |
71%
From NCERT
AIPMT - 2011
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
A point object (A) is placed on the principal axis of a convex lens (focal length = 30 cm) at a distance of 45 cm from it. The image is formed at position B. If the object A is moved up by 1 cm then the image moves:
1. down by 1 cm
2. down by 2 cm
3. up by 1 cm
4. up by 2 cm
1. down by 1 cm
2. down by 2 cm
3. up by 1 cm
4. up by 2 cm
Subtopic: Lenses |
64%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
A parallel beam of width 20 mm is incident onto a lens and the width of the emerging beam decreases at a rate of 1 mm as it travels every 3 cm. The lens has a focal length of:
| 1. | 30 cm | 2. | 60 cm |
| 3. | 203 cm | 4. | 403 cm |
Subtopic: Lenses |
63%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.5, the power of the lens is:
| 1. | infinity | 2. | +2 D |
| 3. | +20 D | 4. | +5 D |
Subtopic: Lenses |
74%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
A concave lens with a focal length of −25 cm is sandwiched between two convex lenses, each with a focal length of 40 cm. The power (in diopters) of the combined lens system would be:
| 1. | 55 | 2. | 9 |
| 3. | 1 | 4. | 0.01 |
Subtopic: Lenses |
68%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
- 1(current)
Q. No.
© 2025 GoodEd Technologies Pvt. Ltd.