Reflection of light at spherical surface-MCQ-Basic

Reflection of light at spherical surface-MCQ-Basic

Dear Readers,

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 Basic 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 man having height 6 m, want to see full height in mirror. They observe image of 2 m height erect, then used mirror is

•  Concave
•  
•  Plane
•  None of the Above

Convex

Q2. An object of length 6 cm is placed on the principal axis of a concave mirror of focal length f at a distance of 4 f. The length of the image will be

•  2 cm
•  12 cm
•  4 cm
•  1.2 cm

2 cm

Q3. Convergence of concave mirror can be decreased by dipping in

•  Water
•  Oil
•  Both
•  None of the Above

None of the Above

Q4. An object 2.5 cm high is placed at a distance of 10 cm from a concave mirror of radius of curvature 30 cm The size of the image is

•  9.2 cm
•  10.5 cm
•  5.6 cm
•  7.5 cm

7.5 cm

Q5. A diminished virtual image can be formed only in

•  Plane mirror
•  A concave mirror
•  A convex mirror
•  Concave-parabolic mirror

A convex mirror

Q6. A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at

•  Infinity
•  Focus
•  Pole
•  15 cm behind the mirror

15 cm behind the mirror

Q7. The focal length of a convex mirror is 20 cm its radius of curvature will be

•  10 cm
•  20 cm
•  30 cm
•  40 cm

40 cm

Q8. Under which of the following conditions will a convex mirror of focal length f produce an image that is erect, diminished and virtual

•  Only when 2f > u > f
•  Only when u = f
•  Only when u < f
•  Always

Always

Q9. A concave mirror gives an image three times as large as the object placed at a distance of 20 cm from it. For the image to be real, the focal length should be

•  10 cm
•  15 cm
•  20 cm
•  30 cm

15 cm

Q10. An object is placed at 20 cm from a convex mirror of focal length 10 cm. The image formed by the mirror is

•  Real and at 20 cm from the mirror
•  Virtual and at 20 cm from the mirror
•  Virtual and at 20/3 cm from the mirror
•  Real and at 20/3 cm from the mirror

Virtual and at 20/3 cm from the mirror