Revision Geometrical Optics
Authored by SES kmj
Physics
11th Grade
NGSS covered
Used 43+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A concave lens forms the image of an object such that the distance between the object and image is 10 cm and the magnification produced is 1/4. The focal length of the lens will be : __________
8.6 cm
6.2 cm
10 cm
4.4 cm
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the distances of an object and its virtual image from the focus of a convex lens of focal length f are 1 cm each, then f is _______________
4 cm
(√2 +1) cm
2√2 cm
( 2 + √2 ) cm
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
To determine the characteristics of image formed we need to a draw ray diagram that uses
at least 2 rays that overlap each other
at least 3 rays out of 4 rays
plane mirror or lens
rays that passes through biconcave or biconvex mirror
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An image is formed upside down in front of mirror and seems bigger by 2 times from the actual size. What might be the type of mirror uses?
concave mirror
convex mirror
plane mirror
concave lens
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
An object is placed 20 cm at the left side of a biconcave lens with focal length of 12 cm. Find the position of the image formed.
-7.5 cm
30 cm
-30 cm
7.5 cm
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Calculate the focal length when given u=15cm and a virtual image at 25 cm is formed. State the type of lens used.
37.5 cm (biconcave lens)
-37.5 cm (biconcave lens)
37.5 cm (biconvex lens)
9.4 cm (biconvex lens)
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the characteristic of image formed when given that u and f have the same value of length
real or virtual, image formed at infinity
same size, inverted and real
magnified, inverted and real
magnified, upright and virtual
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