A stick inserted in water looks crooked. this is due to ?
(A) Reflection
(B) refraction
(C) Reflection and refraction
(D) None of these
Used in solar cooker?
(A) concave mirror
(B) convex mirror
(C) plane mirror
(D) None of these
What is the refractive index of diamond?
(A) 1.77
(B) 1.47
(C) 1.44
(D) 2.42
What type of light beam is obtained by flashlight?
(A) parallel light beam
(B) convergent light
(C) Unrefracted light beam
(D) All the statements are true
What is the nature of real reflection?
(A) Reverse
(B) straight
(C) upright and upside down
(D) None of these
According to the law of reflection of light -
(A) The angle of incidence is greater than the angle of reflection
(B) The angle of incidence is equal to the angle of reflection
(C) The angle of incidence is smaller than the angle of reflection
(D) All the statements are true
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