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Q. No.A ray of light is directed toward a corner reflector as shown. The incident ray makes an angle of \(22^\circ\)
| 1. | \(22^\circ\) | 2. | \(68^\circ\) |
| 3. | \(44^\circ\) | 4. | \(34^\circ\) |
Subtopic: Reflection at Plane Surface |
79%
From NCERT
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A ray of light is incident on a mirror which is lying on the \(x\text-y\) plane. The reflected ray travels along the direction of the vector \(3\hat i-4\hat j+2\hat k.\) The incident ray must be along:
| 1. | \(-3\hat i+4\hat j+2\hat k\) | 2. | \(3\hat i-4\hat j-2\hat k\) |
| 3. | \(-3\hat i-4\hat j+2\hat k\) | 4. | \(-3\hat i+4\hat j-2\hat k\) |
Subtopic: Reflection at Plane Surface |
From NCERT
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Given below are two statements:
| Statement I: | Image formation needs regular reflection and/or refraction. |
| Statement II: | The variety in colour of objects we see around us is due to the constituent colours of the light incident on them. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 1. | Statement I is correct but Statement II is incorrect. |
| 2. | Statement I is incorrect but Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Reflection at Plane Surface |
58%
From NCERT
NEET - 2024
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The image formed by a concave mirror:
| 1. | is always real |
| 2. | is always virtual |
| 3. | is certainly real if the object is virtual |
| 4. | is certainly virtual if the object is real |
Subtopic: Reflection at Spherical Surface |
54%
From NCERT
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The diagram represents a concave mirror, where \(F\) is the principal focus and \(f\) is the focal length. The mirror is used to produce an image of an object.
Which of the following statements are correct?
(assume the mirror is parabolic)
Choose the correct option:
Which of the following statements are correct?
(assume the mirror is parabolic)
| (A) | Incident rays travelling parallel to the principal axis always pass through \(F\) after reflection. |
| (B) | Incident rays passing through \(F\) always travel parallel to the principal axis after reflection. |
| (C) | The image formed is always inverted. |
| (D) | The image formed is always real. |
| (E) | The image formed is always larger than the object. |
Choose the correct option:
| 1. | (A) and (C) only |
| 2. | (C), (D) and (E) only |
| 3. | (B) and (D) only |
| 4. | (A) and (B) only |
Subtopic: Reflection at Spherical Surface |
83%
From NCERT
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A parallel beam of light is incident onto a converging lens \((L_1)\) of focal length \(20\) cm. A second identical lens \((L_2)\) is to be placed behind \(L_1,\) coaxially, so that the emerging beam is parallel. The distance between \(L_1\) and \(L_2\) should be:
| 1. | \(10\) cm | 2. | \(20\) cm |
| 3. | \(40\) cm | 4. | zero |
Subtopic: Lenses |
76%
From NCERT
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The direction of ray of light incident on a concave mirror is shown by \(\mathrm{PQ}\) while directions in which the ray would travel after reflection is shown by four rays marked \(1,2,3\) and \(4\). Which of the four rays correctly shows the direction of reflected ray?
| 1. | \(1\) | 2. | \(2\) |
| 3. | \(3\) | 4. | \(4\) |
Subtopic: Reflection at Spherical Surface |
67%
From NCERT
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A car is moving with at a constant speed of \(60~\text{km/h}\) on a straight road. Looking at the rear view mirror, the driver finds that the car following him is at a distance of \(100~\text{m}\) and is approaching with a speed of \(5~\text{km/h}\). In order to keep track of the car in the rear, the driver begins to glance alternatively at the rear and side mirror of his car after every \(2~\text{s}\) till the other car overtakes. If the two cars were maintaining their speeds, which of the following statement (s) is/are correct?
| 1. | The speed of the car in the rear is \(65~\text{km/h}\). |
| 2. | In the side mirror the car in the rear would appear to approach with a speed of \(5~\text{km/h}\) to the driver of the leading car. |
| 3. | In the rear view mirror the speed of the approaching car would appear to decrease as the distance between the cars decreases. |
| 4. | In the side mirror, the speed of the approaching car would appear to increase as the distance between the cars decreases. |
Subtopic: Reflection at Spherical Surface |
From NCERT
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An object is placed on the principal axis of a concave mirror at a distance of \(1.5f\) (\(f\) is the focal length). The image will be at:
| 1. | \(-3f\) | 2. | \(1.5f\) |
| 3. | \(-1.5f\) | 4. | \(3f\) |
Subtopic: Reflection at Spherical Surface |
68%
From NCERT
NEET - 2020
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An object is at the centre of the curvature of a concave mirror having a radius of curvature \(R.\) If the object is displaced by \(\dfrac R2\) away from the mirror, the displacement of the image will be:
| 1. | \(\dfrac{5R}{8}\) towards the mirror |
| 2. | \(\dfrac{5R}{8}\) away from the mirror |
| 3. | \(\dfrac R4\) towards the mirror |
| 4. | \(\dfrac R4\) away from mirror |
Subtopic: Reflection at Spherical Surface |
61%
From NCERT
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