Class X Science
Subject: Physics
Light – Reflection & Refraction
Q. 1. Coin placed in a bowl when seen from a place just disappears. When water is poured into the bowl without disturbing the coin , the coin(A) Will not be seen
(B) Appears above the water surface
(C) Becomes visible again
(D) Appears very much deep inside the water
Q. 2. Nature of the image formed by a convex mirror is
(A) Real, inverted, diminished
(B) Virtual, erect, diminished
(C) Real , inverted , enlarged
(D) Virtual, erect, enlarged
Q. 3. The property of a mirror used in burning a paper is
(A) Rays from an object placed at a large distance in a concave mirror after reflection forms the image at the Focus
(B) Rays from an object placed at a large distance in a convex mirror after reflection forms the image at the Focus
(C) Rays from an object placed at Focus after reflection in a concave mirror forms the image at a very large distance.
(D) Rays from an object placed between F and 2F in a concave mirror after reflection forms the image beyond the Focus
Q. 4. The focal length of a concave mirror is 10cm. The position of the object that is useful for getting an enlarged image which can be caught on a screen is
(A) Placed at a distance of 5 cm. from the pole of the mirror
(B) Placed at a distance of 15 cm from the pole of the mirror
(C) Placed at a distance of 35 cm from the pole of the mirror
(D) Placed at a distance of 5 cmfrom the pole of the mirror
Q. 5. The power of a lens is -3.5D. The lens is
(A) Convex
(B) Concave
(C) Plano-convex
(D) Plano-concave
Q. 6. Formula to find the refractive index of a medium is
(A) n=speed of light in the medium /speed of light in air
(B) n=1 /speed of light in air
(C) n=speed of light in the air/speed of light in the medium
(D) n=1 /speed of light in the medium
Q. 7. In case of refraction through a glass slab
(A) Incident ray is parallel to the refracted ray
(B) Incident ray is parallel to the emergent ray
(C) Angle of incidence is equal to the angle of refraction
(D) Angle of refraction is equal to the angle of emergence
Q. 8. Mirror that can be chosen to view a tall building in a small mirror is
(A) Plane mirror
(B) Concave mirror
(C) Convex mirror
(D) Plano-Convex mirror
Q. 9. Mirror formula is
(A) 1/v-1/u =1/f
(B) M=v/u
(C) 1/v+1/u =1/f
(D) M=h/h’
Q. 10. The mirror used by ENT specialists is
(A) Plane mirror
(B) Concave mirror
(C) Convex mirror
(D) Plano-convex mirror
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