Railway Science (Physics-Light and Optics) (Part-VIII)

Total Questions: 12

11. An object is placed 30 cm before a concave mirror of focal length of 20 cm to get a real image. What will be the distance of the image from the mirror? [RRB ALP Tier - I (30/08/2018) Evening]

Correct Answer: (a) 60 cm
Solution:

12. An object of 1.2 cm height is placed 30 cm before a concave mirror of focal length of 20 cm to get a real image at a distance of 60 cm from the mirror. What is the height of the image formed? [RRB ALP Tier - I (31/08/2018) Morning]

Correct Answer: (b) – 2.4 cm
Solution:

Given that, Height of Object (hₒ) = 1.2 cm, Height of image (hᵢ) = ?,