Assertion (A) There is no dispersion of light refracted through a rectangular glass slab.Reason (R) Dispersion of light is the phenomenon of splitting of a beam of white light into its constituent colours.
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true, but R is not the correct explanation of A
C. A is true, but R is false
D. A is false, but R is true
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For normal eyes what is the minimum distance for clear vision?
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
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The magnifying glass is
A. convex lens
B. convex mirror
C. concave lens
D. concave mirror
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What will be the size of image formed by a concave mirror when an object placed between pole and focus?
A. Same Size
B. Enlarged
C. Point Size
D. Diminished
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Which of the following statement is true?
A. The light has a greater velocity
B. The sound has the greatest velocity
C. Celestial objects have the greatest velocity
D. Rocket has the greatest velocity
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When light waves pass from air to glass the variable affected are
A. Wavelength, frequency and velocity
B. Velocity and frequency
C. Wavelength and frequency
D. Wavelength and velocity
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The centre of the reflecting surface of a spherical mirror is called the
A. pole
B. radius
C. centre of curvature
D. focus
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A spoon which looks bent in water is an example of which of the following?
A. reflection
B. refraction
C. retention
D. focus
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Which of the following types of the mirror is used to see the traffic behind the car?
A. Convex mirror
B. Concave mirror
C. Plane mirror
D. Spherical mirror
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Which of the following is used to take 3-dimensional pictures?
A. Photography
B. Holography
C. Radiography
D. None of these
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The least distance (in cm) of distinct vision in
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When a strong beam of light is passed through a colloidal solution, the light will
A. be scattered
B. pass unchanged
C. be absorbed
D. be reflected
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Statement I Diamond is very bright.Statement II Diamond has very low refractive index.
A. Both the statements are individually true and statement II is the correct explanation of statement I
B. Both the statements are individually true but statement II is not the correct explanation of statement I
C. Statement I is true, but statement II is false
D. Statement I is false, but statement II is true
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A simple magnifying Glass includes:
A. Convex lens of high focal length
B. Concave lens of short focal length
C. Concave lens of high focal length
D. Convex lens of short focal length
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Consider the following statements.
A. 1 and 2
B. Only 2
C. 2 and 3
D. All of these
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Concave mirror is used in headlights of vehicles, because it
A. focuses light from the bulb onto nearby vehicles
B. sends parallel rays
C. fits well into the shape of the headlight
D. is cheaper than other mirrors
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Which one of the following processes is responsible for the glittering of air bubble rising through water?
A. Reflection of light
B. Refraction of light
C. Total internal reflection of light
D. Scattering of light
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An object is placed in front of a convex mirror. What kind of image will be made?
A. at optical centre C, virtual, erect image of the same size of the object
B. virtual, erect, small size, between pole and focus
C. real, inverted, small size, between optical center C and focus F
D. virtual, erect, small size, at the focus F
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Magnifying glass is basically a
A. plano-concave lens
B. concave lens
C. convex lens
D. cylindrical lens
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Which of the following substance is less dense visually?
A. air
B. turpentine
C. benzene
D. water
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