Last Updated On [03-11-2023]
A point object is placed at distance of 20 cm from a thin planoconvex lens of focal length 15 cm. The plane surface of the lens is now silvered. The image created by the system is at
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|
a) |
60 cm to the left of the system |
|
b) |
60 cm to the right of the system |
|
c) |
12 cm to the left of the system |
|
d) |
12 cm to the right of the system |
Question ID - 152516 :- A point object is placed at distance of 20 cm from a thin planoconvex lens of focal length 15 cm. The plane surface of the lens is now silvered. The image created by the system is at
a)
60 cm to the left of the system
b)
60 cm to the right of the system
c)
12 cm to the left of the system
d)
12 cm to the right of the system
A point object is placed at distance of 20 cm from a thin planoconvex lens of focal length 15 cm. The plane surface of the lens is now silvered. The image created by the system is at
|
a) |
60 cm to the left of the system |
|
b) |
60 cm to the right of the system |
|
c) |
12 cm to the left of the system |
|
d) |
12 cm to the right of the system |
|
(c) Refraction from lens
Ie, first image is formed at 60 cm to the right of lens system. Reflection from mirror After reflection from the mirror, the second image will be formed at a distance of 60 cm to the left of lens system. Refraction from lens Or Therefore, the final image is formed at 12 cm to the left of the lens system. |
direction
+ ve direction
Next Question :
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A circular disc of which 2/3 part is coated with yellow and 1/3 part is with blue. It is rotated about its central axis with high velocity, then it will be seen as |
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a) |
Green |
b) |
Brown |
c) |
White |
d) |
Violet |
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