Light - Study Mode
[#206] The focal length of a convex mirror is . . . . . . . .
Correct Answer
(C) positive
[#207] Which colour is formed when Red and Green are mixed?
Correct Answer
(B) Yellow
[#208] The focal length of a convex lens is 2.5 m. Find its power.
Correct Answer
(B) 0.4 D
[#209] To get the real reflection, an object is placed at a distance of 30 cm from a concave mirror with a focal length of 20 cm. What will be the distance of image from mirror?
Correct Answer
(A) 60 cm
[#210] A ray of light when refracted suffers change in velocity. In this context, which one among the following statements is correct?
Correct Answer
(C) Velocity decreases as the ray passes from a rarer to a denser medium