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प्रश्न
What is the relation between the focal length and radius of curvature of a spherical mirror (concave mirror or convex mirror)?
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उत्तर
The relation between the focal length and radius of curvature of a spherical mirror is as follows:
Radius of curvature = 2 × focal length
R = 2f
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संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Principal focus
Explain the following term related to spherical lenses: focal length
We can obtain a real, enlarged and inverted image by a concave mirror.
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
- What will be the focal length of this mirror?
- Which type of spherical mirror will it provide?
- State whether this spherical mirror will diverge or converge light rays.
Write the formula for a lens connecting image distance (v), object distance (u) and the focal length (f). How does the lens formula differ from the mirror formula?
Name the kind of mirror used to obtain
(a) a real and enlarged image
(b) a virtual and enlarged image
(c) a real and diminished image, and
(d) a virtual and diminished image.
Name the two kinds of spherical mirrors and distinguish between them.
Name the kind of mirror used to obtain:
A virtual and enlarged image
What is meant by magnification? Write its expression. What is its sign for the (a) real (b) virtual, image?
Which mirror will you prefer to use as a rear view mirror in a car : plane mirror or convex mirror? Give one reason.
The image formed by a convex mirror is
An object of length 4 cm is placed in front of a concave mirror at distance 30 cm. The focal length of mirror is 15 cm.
- Where will the image form?
- What will be the length of image?
In the following figure shows a concave mirror with its pole (P), focus (F) and centre of curvature (C). Draw a ray diagram to show the formation of the image of an object AB by the concave mirror.
A student traces the path of a ray of light passing through a rectangular slab.
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For measuring the angle of incidence, he must position the protractor in the manner shown in the figure:
