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प्रश्न
Choose the correct alternative and rewrite the following:
Mirror used by a dental surgeon is ..........................
पर्याय
plane
convex
concave
convex and concave
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उत्तर
concave
APPEARS IN
संबंधित प्रश्न
Explain the following term related to spherical lenses:- centres of curvature
Explain the following term related to spherical lenses:- principal focus
Define the Focal length of a spherical mirror
What type of image is formed:
on a cinema screen?
A 2.0 cm tall object is placed 40 cm from a diverging lens of focal length 15 cm. Find the position and size of the image.
State the number of images of an object placed between two mirrors, formed in each case when mirrors are inclined to each other at (a) 90°, and (b) 60°.
Which mirror will you prefer to use as a rear view mirror in a car : plane mirror or convex mirror? Give one reason.
The radius of curvature of a convex mirror is 40 cm. Find its focal length.
When an object of height 1 cm is kept at a distance 4 cm from a concave mirror, its erect image of height 1.5 cm is formed at a distance 6 cm behind the mirror. Find the focal length of mirror, by drawing.
An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of focal length 10 cm. Find the position and size of the image.
Select the correct option:
Which mirror is used in periscope?
Define the term Aperture.
What is the relationship between the focal length and radius of curvature?
Which of the following has curved reflecting surface?
The distance from the pole to the focus is called ______.
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
