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प्रश्न
What type of image is formed:
on a cinema screen?
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उत्तर
The image formed on a cinema screen is real because it is formed due to an actual meeting of the light rays.
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संबंधित प्रश्न
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.
Name the two types of spherical mirrors. What type of mirror is represented by the:
back side of a shining steel spoon?
What do you mean by the term dispersion?
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.
Complete the following diagrams in Figure by drawing the reflected rays for the incident rays 1 and 2.
The diagram below in Figure, shows a convex mirror. C is its centre of curvature and F is its focus. (i) Draw two rays from A and hence locate the position of image of object OA. Label the image IB. (ii) State three characteristics of the image.
State whether the image in part (a) is real or virtual?
How will you distinguish between a plane mirror, a concave mirror and a convex mirror, without touching them?
The image formed by a convex mirror is of size one third the size of object. How are u and v related?
Define the following term:
spherical mirror
Define the following term in relation to concave mirror.
Principal axis
Does the mirror name by your form a real image for all locations? Give a reason for your answer.
What is a mirror formula?
Define the term Pole.
Name the two types of spherical mirrors.
The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this 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.
