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प्रश्न
What type of image is formed:
on a cinema screen?
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
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.
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Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.
Which type of mirror can form a real image?
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.
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?
Define the following term in relation to concave mirror.
Principal focus
Define the term Principal axis.
Define the term Focus of a concave mirror.
The distance from the pole to the focus is called ______.
