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A needle placed 45 cm from lens forms an image on a screen placed 90 cm on the other side of lens, focal length and type of lens is |
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(a) |
10 cm, convex lens |
(b) |
30 cm, convert lens |
|
(c) |
30 cm, concave lens |
(d) |
10 cm, concave lens |
|
A needle placed 45 cm from lens forms an image on a screen placed 90 cm on the other side of lens, focal length and type of lens is |
|||
|
(a) |
10 cm, convex lens |
(b) |
30 cm, convert lens |
|
(c) |
30 cm, concave lens |
(d) |
10 cm, concave lens |