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प्रश्न
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
पर्याय
True
False
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उत्तर
True.
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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 of mirror has:
negative focal length?
What is the nature of a mirror having a focal length of, +10 cm?
An object is placed at a long distance in front of a convex mirror of radius of curvature 30 cm. State the position of its image.
Name the mirror which can give:
an erect and diminished image of an object.
State whether the following statement is true or false:
A diverging mirror is used as a rear-view mirror.
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
Numerical problem.
A concave mirror produces three times magnified real image of an object placed at 7 cm in front of it. Where is the image located? (Ans: 21 cm in front of the mirror)
Identify the device used as a spherical mirror or lens in following case, when the image formed is virtual and erect in case.
Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.
