Posted On : 12-May-2018

Q1: A spherical air bubble is embedded in a piece of glass. For a ray of light passing through the bubble, it behaves like a

• A. Converging lens
• B. Diverging lens
• C. Plano-converging lens
• D. Plano-diverging lens

Q2: What kind of image is created by a concave lens?

• A. upright and smaller
• B. inverted and smaller
• C. inverted and larger
• D. upright and larger

Q3: What kind of lens is used by short-sighted persons?

• A. Convex lens
• B. Concave lens
• C. Cylindrical lens
• D. Compound lens

Q4: A number of images of a candle flame can be seen in a thick mirror. The brightest image is

• A. First
• B. Second
• C. Last
• D. All are of same brightness

Q5: Which one among the following is used to make periscope?

• A. Convex mirror
• B. Concave mirror
• C. Plane mirror
• D. Double sided mirror

Q6: The mirror used for the head light of a car is

• A. Spherical concave
• B. Plane
• C. Cylindrical
• D. Parabolic concave

Q7: The ratio of the focal length of the objective to the focal length of the eyepiece is greater than one for

• A. a microscope
• B. a telescope
• C. both microscope and telescope
• D. neither microscope nor telescope

Q8: The human eye is like a camera and hence it contains a system of lens. The eye lens forms _________.

• A. an upright real image on the retina
• B. an inverted virtual image on the retina
• C. an inverted real image on the retina
• D. an upright virtual image on the retina

Q9: How far must an object be from a concave mirror if the image formed is to be inverted?

• A. less than its focal length
• B. exactly at its focal length
• C. more than its focal length
• D. none of the above

Q10: Different objects at different distances are seen by the eye. The parameter that remains constant is -

• A. the focal length of the eye lens
• B. the object distance from the eye lens
• C. the radii of curvature of the eye lens
• D. the image distance from the eye lens