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प्रश्न
______ is used as reflectors in torchlight.
विकल्प
Concave mirror
Plane mirror
Convex mirror
उत्तर
Concave mirror is used as reflectors in torchlight.
APPEARS IN
संबंधित प्रश्न
To construct a ray diagram we use two rays of light which are so chosen that it is easy to determine their directions after reflection from the mirror. Choose these two rays and state the path of these rays after reflection from a concave mirror. Use these two rays to find the nature and position of the image of an object placed at a distance of 15 cm from a concave mirror of focal length 10 cm.
We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.
According to the "New Cartesian Singh Convention" for mirrors, what sign has been given to the focal length of:
a concave mirror?
An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm.
How far should an object be placed from the pole of a converging mirror of focal length 20cm to form a real image of the size exactly `1/4`th the size of the object?
Match the following.
| Convex mirror | Radio telescopes |
| Parobolic mirror | Rear – view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |
Which of the following mirror is used by a dentist to examine a small cavity in a patient’s teeth?
Under which of the following conditions a concave mirror can form an image larger than the actual object?
The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?
To obtain an image twice the size of the object, between which two points related to a concave mirror should an object be placed?
