- 1(current)
Q. No.A light ray falls on a glass surface of refractive index \(\sqrt{3}\), at an angle of \(60^\circ.\) The angle between the refracted and reflected rays would be:
| 1. | \(120^\circ\) | 2. | \(30^\circ\) |
| 3. | \(60^\circ\) | 4. | \(90^\circ\) |
Subtopic: Â Refraction at Plane Surface |
 62%
Level 2: 60%+
NEET - 2022
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 |
 59%
Level 3: 35%-60%
NEET - 2022
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A ray of light \((1)\) gets reflected partially at the front surface of a thin film of thickness \(t,\) and refractive index \(\mu.\) The reflected ray from the front surface is \(2\) while that emerging due to reflection from the rear surface is \(3.\) Assume that ray \(1\) is incident normally. The optical path difference between rays \(2\) and \(3\) is:
| 1. | \((\mu-1)t\) | 2. | \(2(\mu-1)t\) |
| 3. | \(\mu t\) | 4. | \(2\mu t\) |
Subtopic: Â Refraction at Plane Surface |
Level 4: Below 35%
Hints
A ray of light passes through three parallel media, with the angles of incidence and emergence as shown in the figure. The refractive indices of the media are \(\mu_{1}\) = 1, \(\mu_{2}\) and \(\mu_{3}\).
Then:
Then:
| 1. | \(\mu_{2}=\dfrac{1}{3},~\mu_{3}=\dfrac{1}{2}\) | 2. | \(\mu_{2}=3,~\mu_{3}=\dfrac{3}{2}\) |
| 3. | \(\mu_{2}=\dfrac{1}{3},~\mu_{3}=\dfrac{2}{3}\) | 4. | \(\mu_{2}=3,~\mu_{3}=2\) |
Subtopic: Â Refraction at Plane Surface |
 80%
Level 1: 80%+
Hints
- 1(current)
Q. No.
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