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III - OPTICS, REFRACTION AND CONTACT LENS (35 q)
1- An object is placed 1 m in front of a –1 D spherical lens. The –1 D lens, in turn, is positioned
1.5 m in front of a +1.5 D spherical lens. Where does the –1 D lens form an intermediate
image?
A- At optical infinity
B- 2 m in front of the lens
C- 1 m in front of the lens
D- 0.5 m in front of the lens
E- 2 m behind the lens
2- An object is placed 1 m in front of a –1 D spherical lens. The –1 D lens, in turn, is positioned
1.5 m in front of a +1.5 D spherical lens. Describe the intermediate image.
A- Upright, real, magnified
B- Upright, real, minified
C- Upright, virtual, magnified
D- Upright, virtual, minified
E- Inverted, virtual, minified
3- An object is placed 1 m in front of a –1 D spherical lens. The –1 D lens, in turn, is positioned
1.5 m in front of a +1.5 D spherical lens. What is the size of the intermediate image as
compared to the object?
A- Indeterminate
B- One fourth the size
C- Half the size
D- Same size
E- Twice the size
4- An object is placed 1 m in front of a –1 D spherical lens. The –1 D lens, in turn, is positioned
1.5 m in front of a +1.5 D spherical lens. What is the location of the final image?
A- 1 m in front of the second lens
B- 1 m behind the second lens
C- 4 m behind the second lens
D- 10 m behind the second lens
E- At optical infinity
5- An object is placed 1 m in front of a –1 D spherical lens. The –1 D lens , in turn, is positioned
1.5 m in front of a +1.5 D spherical lens. Describe the final image.
A- Upright, real, magnified
B- Upright, real, minified
C- Inverted, real, magnified
D- Inverted, real, minified
E- Inverted, virtual, minified
6- An object is placed 1 m in front of a –1 D spherical lens. The –1 D lens, in turn, is positioned
1.5 m in front of a +1.5 D spherical lens. What is the size of the final image as compared to
the object?
A- Indeterminate
B- One fourth the size
C- Half the size
D- Same size
E- Twice the size