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- 1. Multiple Choice
The bouncing back of light in the same medium after skriking smooth, polished surface is called
a. Reflection of light
b. Refraction of light
c. Scattering of light
d. Dispersion of light
- 2. Multiple Choice
The angle between the incident ray and the normal ray is called
a. Angle of abnormality
B. angle of refraction
C. angle of incidence
D. angle of reflection
- 3. Multiple Choice
The reflection by the rough surfaces is called
Regular reflection
Irregular reflection
Regular refraction
Irregular refraction
- 4. Multiple Choice
Which one among the following is correct about laws of reflection
Incident ray, normal and reflected ray in different plane
Incident ray and normal lie in same plane while reflected ray in different plane
Incident ray and reflected ray lie in different plane while normal lie in opposite plane
Incident ray, normal and reflected ray all lie in same plane
- 5. Multiple Choice
A light ray strikes a reflective plane surface at an angle of 54° with the surface.
a. Calculate the angle of incidence
b. Calculate the angle of reflection
c. Calculate the angle made by the reflected ray and the surface
d. Calculate the angle made by the incident and reflected rays
A 36
B 36
C 54
D 72
- 6. Multiple Choice
A ray of light that strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is :
a 30°
B 45°.
C 60°
D 90°
- 7. Multiple Choice
The angle of incidence for a ray of light having zero reflection angle is
0°
30°
45°
90 °
- 8. Multiple Choice
An object is placed at a distance of 0.25m in front of a plane mirror. The distance between the object and image will be
0.25m
1.0m
0.5m
0.125m
- 9. Multiple Choice
What is the magnification of the images formed by plane mirrors.
a. Unity
B Two
C. Three
D. Zero
- 10. Multiple Choice
An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the position of the original and final images seen in the mirror is
2cm
4cm
10cm
22cm
- 11. Multiple Choice
Centre of the sphere of which the mirror is a part is called
Radius of curvature
Pole
Principal axis
Centre of curvature
- 12. Multiple Choice
which is the following is correct for concave mirror
It is a diverging mirror
It is a converging mirror
Can be both converging and diverging
Can’t say
- 13. Multiple Choice
Focal length of a plane mirror is
At infinity
Zero
Negative
None of these
- 14. Multiple Choice
Calculate the focal length of a spherical mirror if radius of curvature is 20cm
20cm
10cm
15cm
At infinity
- 15. Multiple Choice
A concave mirror of focal length 20cm forms an image having twice the size of object. For the virtual position of image, the position of object will be at
25cm
40cm
10cm
At infinity
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