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Subjects
Science CBSE
Class 10
Light reflection and refraction
Textbook questions
1.
Exercises I
Exercise condition:
4
m.
Choose the correct answer
:
1
.
Which one of the following materials cannot be used to make a lens?
Water
Plastic
Glass
Clay
2
.
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?
Between the pole of the mirror and its principal focus.
Between the principal focus and the centre of curvature
At the centre of curvature
Beyond the centre of curvature
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