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प्रश्न
Choose the correct alternative and rewrite the following:
Mirror used by a dental surgeon is ..........................
विकल्प
plane
convex
concave
convex and concave
उत्तर
concave
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संबंधित प्रश्न
One half of a convex lens of focal length 10 cm is covered with a black paper. Can such a lens produce an image of a complete object placed at a distance of 30 cm from the lens? Draw a ray diagram to justify your answer. A 4 cm tall object is placed perpendicular to its principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 15 cm. Find the nature, position and the size of the image.
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?
Define the following term in the context of spherical mirrors:- Centre of curvature
Image formed by a convex ______ is always virtual and smaller in size.
Which type of mirror can form a real image?
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What is the advantage of using a carbon paper rather than a white paper?
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
State whether this spherical mirror will diverge or converge light rays.
How is a spherical mirror used to diverge a beam of light from a point? Name the type of mirror used.
State the direction of incident ray which after reflection from a spherical mirror gets reflected along its own path. Give a reason.
State the types of mirrors used for (i) headlights and (ii) rear view mirror, in cars and motorcycles. Give to justify your answer in each case.
Draw suitable diagrams to illustrate the action of (i) concave mirror and (ii) convex mirror on a beam of light incident parallel to the principal axis.
What is meant by magnification? Write its expression. What is its sign for the (a) real (b) virtual, image?
State the kind of mirror used
(a) By a dentist,
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The focal length of a concave mirror is 10 cm. Find its radius of curvature.
The magnification for a mirror is -3. How are u and v related?
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.
A straight stick partly dipped in water obliquely, appears to be bent at the surface of water.
Define the following term:
spherical mirror
What is a mirror formula?
What is the relationship between the focal length and radius of curvature?
AB is the object, A1B1 is its image. MM' is the position of the mirror. Complete the ray diagram and find the position of the center of curvature and focus of the mirror. Also, measure the focal length.
Define the term Centre of curvature.
Define the term Principle focus.
Which of the following has curved reflecting surface?
The spherical mirror used as a rear view mirror in the vehicle is
The spherical mirror used in a beauty parlour as make-up mirror is _______.
The image formed in a plane mirror is always inverted.
How tall does a mirror have to be to fit an entire person’s body?
Visit a nearby hospital. You can also visit the clinic of an ENT specialist, or a dentist. Request the doctor to show you the mirrors used for examining ear, nose, throat and teeth. Can you recognise the kind of mirror used in these instruments?
