- 1(current)
Q. No.Consider three media \(P,Q\) and \(R\) with refractive indices \(1,\) \(1.25,\) and \(1.5,\) respectively. The medium \(Q\) having a thickness of \(5\) cm is placed between the extended media \(P\) and \(R\) as shown in the figure. An object \(O\) is placed at the centre of medium \(Q.\) If viewed from the medium \(P\) near the normal direction, the apparent depth of \(O\) is \(h_1.\) For similar observation from the medium \(R,\) the apparent depth is \(h_2.\) The value of \(|h_1 - h_2| \) in cm, is:
1. \(3\)
2. \(0\)
3. \(1\)
4. \(2\)
1. \(3\)
2. \(0\)
3. \(1\)
4. \(2\)
Subtopic: Â Refraction at Plane Surface |
Level 3: 35%-60%
NEET - 2026
Please attempt this question first.
Hints
Please attempt this question first.
The time taken by sunlight to pass through a glass slab of thickness \(5~\text{mm}\) and refractive index \(1.5\) is:
| 1. | \(\left(\dfrac{5}{3}\right) \times 10^{-8}~\text{s}\) | 2. | \(\left(\dfrac{5}{2}\right) \times 10^{-11}~\text{s}\) |
| 3. | \(\left(\dfrac{5}{3}\right) \times 10^{-11}~\text{s}\) | 4. | \(\left(\dfrac{5}{2}\right)\times 10^{-8}~\text{s}\) |
Subtopic: Â Refraction at Plane Surface |
 72%
Level 2: 60%+
NEET - 2024
Hints
A beam of light is incident vertically on a glass slab of thickness \(1~\text{cm},\) and refractive index \(1.5.\) A fraction \(A\) is reflected from the front surface while another fraction \(B\) enters the slab and emerges after reflection from the back surface. The time delay between them is:
1. \(10^{-10}~\text{s}\)
2. \(5\times 10^{-10}~\text{s}\)
3. \(10^{-11}~\text{s}\)
4. \(5\times 10^{-11}~\text{s}\)
Subtopic: Â Refraction at Plane Surface |
 60%
Level 2: 60%+
NEET - 2022
Hints
- 1(current)
Q. No.
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