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Practice each question, then open the answer or worked solution.
A virtual image larger than the object can be produced by a
(i) concave lens (ii) concave mirror
(iii) convex mirror (iv) plane mirror
The correct answer is option (ii) concave mirror.
David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be
(i) 3 m (ii) 5 m
(iii) 6 m (iv) 8 m
The answer is option (iii) 6 m
The rearview mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m/s. The driver sees in his rearview mirror the image of a truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be
(i) 1 m/s (ii) 2 m/s
(iii) 4 m/s (iv) 8 m/s
The correct answer is option (iii) 4 m/s.
Important topics covered in NCERT Solutions for Class 7 Science Chapter 15 Light| 1 | Light Travels along a Straight Line |
| 2 | Reflection of Light |
| 3 | Right or Left! |
| 4 | Playing with Spherical Mirrors |
| 5 | Images Formed by Lenses |
| 6 | Sunlight – White or Coloured? |
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