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प्रश्न
A ray of light passing through centre of curvature of a spherical mirror, after reflection
पर्याय
passes through the focus
passes through the pole
becomes parallel to the principal axis
retraces its own path.
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उत्तर
retraces its own path.
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संबंधित प्रश्न
In a convex spherical mirror, reflection of light takes place at:
(a) a flat surface
(b) a bent-in surface
(c) a bulging-our surface
(d) an uneven surface
A diverging mirror is
(a) a plane mirror
(b) a convex mirror
(c) a concave mirror
(d) a shaving mirror
Which type or mirror is usually used as a rear-view mirror in motor cars?
An object is placed at the following distance from a convex lens of focal length 15 cm:
(a) 35 cm
(b) 30 cm
(c) 20 cm
(d) 10 cm
Which position of the object will produce:
(i) a magnified real image?
(ii) a magnified virtual image?
(iii) a diminished real image?
(iv) an image of same size as the object?
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
A .............. mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.
State two uses of a convex mirror.
The distance between an object and a convex lens is changing. It is noticed that the size of the image formed on a screen is decreasing. Is the object moving in a direction towards the lens or away from it?
If the object is at infinity in front of a convex mirror the image is formed at infinity.
Match the following.
| Column I | Column II |
| Convex mirror | Radio telescopes |
| Parabolic mirror | Rear-view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |
