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प्रश्न
A diverging mirror of radius of curvature 40 cm forms an image which is half the height of the object. Find the object and image positions.
उत्तर
The mirror is convex.
⇒`1/20=(-1)/u`
⇒`u=-20cm`
⇒`v=-((-20))/2`
⇒`v=10 cm`
Notes
`1/f=1/u-2/u(-1)/u`
⇒`1/20=(-1)/u`
⇒`u=-20cm`
⇒`v=-((-20))/2`
⇒`v=10 cm`
संबंधित प्रश्न
Suppose you have focused on a screen the image of candle flame placed at the farthest end of the laboratory table using a convex lens. If your teacher suggests you to focus the parallel rays of the sun, reaching your laboratory table, on the same screen, what you are expected to do is to move the:
(a) lens slightly towards the screen
(b) lens slightly away from the screen
(c) lens slightly towards the sun
(d) lens and screen both towards the sun
An image formed by a concave ______ cannot be obtained on a screen.
A concave lens always forms a virtual image.
State two differences between a convex and a concave lens.
Which type of lens forms always a virtual image?
If a spherical lens has a power of, −0.25 D, the focal length of this lens will be :
(a) −4 cm
(b) −400 mm
(c) −4 m
(d) −40 cm
A lens forms the image of an object placed at a distance 15 cm from it, at a distance 60 cm in front of it. Find the nature of image.
My grandfather uses a bifocal lens in his spectacle. Explain why.
Complete the ray diagram to show how the rays pass into and out of the lens?
Which diagram shows image formation of an object on a screen by a converging lens?
