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Question
In which equipment/s do you find ___________________
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Solution
(i) Concave mirror is found in torches, headlights, flood lights, solar devices,dentist's mirror.
(ii) Convex lens is used in simple microscope, compound microscope, telescopes, optical instruments and spectacles.
(iii) Reflecting mirrors are used in projector lamps, telescopes.
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RELATED QUESTIONS
Draw a ray diagram to show the path of the refracted ray in each of the following cases:-
A ray of light incident on a concave lens is
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(ii) parallel to its principal axis.
(iii) directed towards its principal focus.
The radius of curvature of a spherical mirror is 20 cm. What is its focal length?
Name the mirror that can give an erect and enlarged image of an object.
Fill in the following blank with suitable word:
A concave mirror .......... rays of light whereas convex mirror ............ rays
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(c) −0.4
Which of the following are concave mirrors and which convex mirrors?
Shaving mirrors, Car headlight mirror, Searchlight mirror, Driving mirror, Dentist's inspection mirror, Touch mirror, Staircase mirror in a double-decker bus, Make-up mirror, Solar furnace mirror, Satellite TV dish, Shop security mirror.
The diagram shows a dish antenna which is used to receive television signals from a satellite. The antenna (signal detector) is fixed in front of the curved dish.
Figure
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(b) Should it be concave or convex?
(c) Where should the antenna be positioned to receive the strongest possible signals?
(d) Explain what change you would expect in the signals if a larger dish was used.
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(C) no image as the screen has been removed
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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 |
For a real object, which of the following can produce a real image?
An object at a distance of 30 cm from a
concave mirror gets its image at the same point. The focal length of the mirror is ______.
In the headlights of motor vehicles, ______ mirrors are used as reflectors.
To obtain an image twice the size of the object, between which two points related to a concave mirror should an object be placed?
Which type of mirror is used in the following?
Floodlights
