If \(f=0.5\) m for a glass lens, what is the power of the lens?
1. \(+0.4\) D
2. \(+4.0\) D
3. \(+0.2\) D
4. \(+2.0\) D

Subtopic:  Lenses |
 86%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The radii of curvature of the faces of a double convex lens are \(10\) cm and \(15\) cm. Its focal length is \(12\) cm. What is the refractive index of glass?
1. \(1.3\)
2. \(1.2\)
3. \(1.5\)
4. \(1.4\)

Subtopic:  Lenses |
 81%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A convex lens has a \(20~\text{cm}\) focal length in air. What is the focal length in water? (Refractive index of air-water = \(1.33\), refractive index for air-glass = \(1.5\))
1. \(+72.72~\text{cm}\)
2. \(+78.2~\text{cm}\)
3. \(-72.72~\text{cm}\)
4. \(+70.2~\text{cm}\)

Subtopic:  Lenses |
 68%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links

Find the position of the image formed by the lens combination in the given figure.


 

1. Final image is formed 30 cm to the right of the third lens.
2. Final image is formed 20 cm to the left of the third lens.
3. Final image is formed 30 cm to the left of the third lens.
4. Final image is formed 20 cm to the right of the third lens.

Subtopic:  Lenses |
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links

What focal length should the reading spectacles have for a person for whom the least distance of distinct vision is \(50~\text{cm}\)?
1. \(-50~\text{cm}\)
2. \(+50~\text{cm}\)
3. \(-60~\text{cm}\)
4. \(+60~\text{cm}\)

Subtopic:  Lenses |
 64%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links