Chapter 3 Mcqs - Geometric Optics Flashcards
1
Q
Radius of curvature of convex mirror is 20 cm, its focal length is
A
10 cm
2
Q
Incident ray of light makes an angle of 30 degrees with plane mirror. What is the angle of reflection of light ray?
A
60 degrees
3
Q
Focal length of concave point is
A
negative
4
Q
A virtual, erect and smaller than object image is always formed by
A
convex mirror
5
Q
A denser medium has a refractive index of 1.5 then critical angle for it is
A
41.8
6
Q
concave lens form virtual, erect and diminished image if the object is placed between F and C
A
7
Q
concave length has focal length of 5 cm. Find its power
A
20 D
8
Q
A magnifying glass has focal length of 5 cm, then its magnifying power is
A
6
9
Q
Near point of person lies at 40 cm from him, he is suffering from
A
Far sightedness
10
Q
Accommodation is done by
A
Ciliary muscle
