- 1(current)
Q. No.The focal length of a glass \((\mu = 1.5)\) lens in air is \(20\) cm. If it is dipped in water \(\left(\mu= \frac{4}{3}\right)\) its focal length in water will be:
| 1. | \(80\) cm | 2. | \(40\) cm |
| 3. | \(60\) cm | 4. | \(20\) cm |
Subtopic: Lens Makers' Formula |
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
Please attempt this question first.
Launched MCQ Practice Books
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA plane-convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices \(\mu_1\) and \(\mu_2\) and \(R\) is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is:
| 1. | \(\frac{R}{2(\mu_1+\mu_2)}\) | 2. | \(\frac{R}{2(\mu_1-\mu_2)}\) |
| 3. | \(\frac{R}{(\mu_1-\mu_2)}\) | 4. | \(\frac{2R}{(\mu_2-\mu_1)}\) |
Subtopic: Lens Makers' Formula |
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
Please attempt this question first.
Launched MCQ Practice Books
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
© 2024 GoodEd Technologies Pvt. Ltd.