A man holds a rectangular card in front of and parallel to a plane mirror. In order for him to see the entire image of the card, the least mirror area needed is: A. that of the whole mirror, regardless of its size B. that of the pupil of his eye C. one-half that of the card D. one-fourth that of the card E. an amount which decreases with his distance from the mirror

A man holds a rectangular card in front of and parallel to a plane mir

1.	A man holds a rectangular card in front of and parallel to a plane mirror. In order for him to see the entire image of the card, the least mirror area needed is: A. that of the whole mirror, regardless of its size B. that of the pupil of his eye C. one-half that of the card D. one-fourth that of the card E. an amount which decreases with his distance from the mirror
Answer» D. one-fourth that of the card

Discussion

No Comment Found

Related InterviewSolutions

What type of eyeglasses should a nearsighted person wear? A. diverging lenses B. bifocal lenses C. converging lenses D. plano-convex lenses E. double convex lenses
A nearsighted person can see clearly only objects within 1.4 m of her eye. To see distant objects, she should wear eyeglasses of what type and focal length? A. diverging, 2.8 m B. diverging, 1.4 m C. converging, 2.8 m D. converging, 1.4 m E. diverging, 0.72 m
A convex spherical refracting surface separates a medium with index of refraction 2 from air. The image of an object outside the surface is real: A. always B. neverC. only if it is close to the surface D. only if it is far from the surface E. only if the radius of curvature is small
A convex spherical surface with radius r separates a medium with index of refraction 2 from air. As an object is moved toward the surface from far away along the central axis, its image: A. changes from virtual to real when it is r/2 from the surface B. changes from virtual to real when it is r from the surface C. changes from real to virtual when it is r/2 from the surface D. changes from real to virtual when it is r from the surface E. remains real
A concave refracting surface of a medium with index of refraction n produces a real image no matter where an object is placed outside: A. always B. only if the index of refraction of the surrounding medium is less than n C. only if the index of refraction of the surrounding medium is greater than n D. never E. none of the above
A hollow lens is made of thin glass, as shown. It can be filled with air, water (n = 1.3) or CS2 (n = 1.6). The lens will diverge a beam of parallel light if it is filled with:A. air and immersed in air B. air and immersed in water C. water and immersed in CS2 D. CS2 and immersed in water E. CS2 and immersed in CS2
A concave spherical surface with radius r separates a medium with index of refraction 2 from air. As an object is moved toward the surface from far away along the central axis, its image: A. changes from virtual to real when it is r/2 from the surface B. changes from virtual to real when it is 2r from the surface C. changes from real to virtual when it is r/2 from the surface D. changes from real to virtual when it is 2r from the surface E. remains virtual
An ordinary magnifying glass in front of an erect object produces an image that is: A. real and erect B. real and inverted C. virtual and inverted D. virtual and erect E. none of these
A convex refracting surface has a radius of 12 cm. Light is incident in air (n = 1) and refracted into a medium with an index of refraction of 2. To obtain light with rays parallel to the central axis after refraction a point source should be placed on the axis: A. 3 cm from the surface B. 6 cm from the surface C. 12 cm from the surface D. 18 cm from the surface E. 24 cm from the surface
Which of the following is NOT correct for a simple magnifying glass? A. The image is virtual B. The image is erect C. The image is larger than the object D. The object is inside the focal pointE. The lens is diverging

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment