## Reflection of light at spherical surface-MCQ-Advance

Physics is an important subject in preparation for various Competitive exams.To keep a track of your preparation we have designed a small quiz of 10 Advance Level Questions on Reflection of light at spherical surface. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. A point object is moving on the principal axis of a concave mirror of focal length 24 cm towards the mirror. When it is at a distance of 60 cm from the mirror, its velocity is 9 cm/sec. What is the velocity of the image at that instant

•  5 cm/sec towards the mirror
•  4 cm/sec towards the mirror
•  4 cm/sec away from the mirror
•  9 cm/sec away from the mirror

4 cm/sec away from the mirror

Q2. A convex mirror of focal length 10 cm forms an image which is half of the size of the object. The distance of the object from the mirror is

•  10 cm
•  20 cm
•  5 cm
•  15 cm

10 cm

Q3. A concave mirror is used to focus the image of a flower on a nearby well 120 cm from the flower. If a lateral magnification of 16 is desired, the distance of the flower from the mirror should be

•  8 cm
•  12 cm
•  80 cm
•  100 cm

8 cm

Q4. A thin rod of 5 cm length is kept along the axis of a concave mirror of 10 cm focal length such that its image is real and magnified and one end touches the rod. Its magnification will be

•  1
•  2
•  3
•  4

1

Q5. A luminous object is placed 20 cm from surface of a convex mirror and a plane mirror is set so that virtual images formed in two mirrors coincide. If plane mirror is at a distance of 12 cm from object, then focal length of convex mirror, is

•  5 cm
•  10 cm
•  20 cm
•  40 cm

5 cm

Q6. A rear mirror of a vehicle is cylindrical having radius of curvature 10 cm. The length of arc of curved surface is also 10 cm. If the eye of driver is assumed to be at large distance, from the mirror, then the field of view in radian is

•  0.5
•  1
•  2
•  4

1

Q7. A concave mirror forms an image of the sun at a distance of 12 cm from it

•  The radius of curvature of this mirror is 6 cm
•  To use it as a shaving mirror, it must be held at a distance of 8-10 cm from the face
•  If an object is kept at a distance of 12 cm from it, the image formed will be of the same size as the object
•  All the above a alternatives are correct

To use it as a shaving mirror, it must be held at a distance of 8-10 cm from the face

Q8. A small piece of wire bent into an L shape with upright and horizontal portions of equal lengths, is placed with the horizontal portion along the axis of the concave mirror whose radius of curvature is 10 cm. If the bend is 20 cm from the pole of the mirror, then the ratio of the lengths of the images of the upright and horizontal portions of the wire is

•  1:2
•  3:1
•  1:3
•  2:1

Always

Q9. A concave mirror has a focal length 20 cm. The distance between the two positions of the object for which the image size is double of the object size is

•  20 cm
•  40 cm
•  30 cm
•  60 cm

20 cm

Q10. A concave mirror of focal length 10 cm and a convex mirror of focal length 15 cm are placed facing each other 40 cm apart. A point object is placed between the mirrors, on their common axis and 15 cm from the concave mirror. Find the position and nature of the image produced by the successive reflections, first at concave mirror and then at convex mirror

•  2 cm
•  4 cm
•  6 cm
•  8 cm

6 cm

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