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प्रश्न
Name the two types of spherical mirrors. What type of mirror is represented by the:
back side of a shining steel spoon?
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उत्तर
The types of spherical mirrors represented by the
back side of a shining steel spoon is convex mirror, and
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संबंधित प्रश्न
A 4 cm tall object is placed on the principal axis of a convex lens. The distance of the object from the optical centre of the lens is 12 cm and its sharp image is formed at a distance of 24 cm from it on a screen on the other side of the lens. If the object is now moved a little away from the lens, in which way (towards the lens or away from the lens) will he have to move the screen to get a sharp image of the object on it again? How will the magnification of the image be affected?
Explain the following term related to spherical lenses:- optical centre
A student focused the Sun rays using an optical device 'X' on a screen S as shown.
From this it may be concluded that the device 'X' is a (select the correct option)
(A) Convex lens of focal length 10 cm.
(B) Convex lens of radius of curvature 20 cm.
(C) Convex lens of focal length 20 cm.
(D) Concave mirror of focal length 20 cm.
Explain the following term related to spherical lenses:- principal focus
Give one use each of a concave and a convex mirror.
A virtual image larger than the object can be produced by a ______.
Define Radius of curvature of the spherical mirror
What kind of mirror is required for obtaining a virtual image of the same size as the object?
Write true or false
A virtual image formed by a spherical mirror is always erect and situated behind the mirror.
A student obtained on a screen the sharp image of a candle flame placed at the farther end of laboratory table using a concave mirror. For getting better value of focal length of the mirror, the teacher suggested to him to focus the sun. What should the student do?
(A) Should move the mirror away from the screen.
(B) Should move the mirror towards the screen.
(C) Should move the mirror and screen both towards the sun.
(D) Should move only the screen towards the sun.
Mention the types of mirrors used as (i) rear view mirrors, (ii) shaving mirrors. List two reasons to justify your answers in each case.
Write two more characteristics of the image.
Define the following term in relation to concave mirror.
Aperture
The following figure shows a concave mirror with its pole (P), focus (F), and center of curvature (C). Draw a ray diagram to show the formation of the image of an object AB by the concave mirror.
The distance from the pole to the focus is called ______.
Name the type of mirror used in the following situation:
Side/rear-view mirror of a vehicle
Support your answer with reason.
What is the difference between virtual images of an object formed by a concave mirror and a convex mirror?
A converging lens of focal length f is placed at a distance 0.3 m from an object to produce an image on a screen 0.9 m from the lens. With the object and the screen in the same positions, an image of the object could also be produced on the screen by placing a converging lens of focal length.
