CBSE CLASS 10TH SCIENCE CHAPTER LIGHT REFLECTION AND REFRACTION PRACTICE PAPER

CBSE CLASS 10TH SCIENCE CHAPTER LIGHT REFLECTION AND REFRACTION PRACTICE PAPER

CBSE CLASS 1OTH LIGHT REFLECTION AND REFRACTION PRACTICE PAPER
LIGHT REFLECTION AND REFRACTION

Answer the following questions:

Q 1 Define principal focus of convex mirror.
Q 2 Why convex mirror is used as a rear view mirror?
Q 3 Distinguish between real images and virtual images.
Q 4 What is the cause of refraction of light?
Q 5 At what angle the ray of light should strike the surface of glass , so that it does not suffer any refraction?
Q 6 State Snell's law of refraction.
Q 7 Will the lateral displacement increases / decreases if glass slab is made more thicker?
Q 8 Does the value of speed of light changes with medium.
Q 9 Define second principal focus of concave lens and convex lens.
Q 10 Define Power of a lens.Give its S I unit.
Q 11 Define 1 D (one Diopter).
Q 12 If power of a lens is negative find the nature of the lens.
Q 13 Define linear magnification . Does it have any unit?
Q 14 Why a concave mirror has a real principal focus , while convex mirror has a virtual principal focus?
Q 15 Will the focal length of a concave mirror change if it is immersed in water?
Q 16 If we cover one half of the convex lens while focusing a distance object in what way will it affect image formed?
Q 17 Write steps to find rough focal length of a convex lens.
Q 18 What is the focal length of a plane mirror?
Q 19 Prove that n12 =1/ n21.
Q 20 If magnification of a lens is -0.5 ,what does it indicates?

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