Question

1.Two diverging lenses are placed 1.10 m apart. The left lens has a focal length of -0.550 m and the right lens has a focal length of -1.20 m. An object is place 0.250 m to the left of the left lens.

i) Where is the image formed by the left lens located? A) 17 cm to the left of left lens B) 93 cm to the left of right lens C) 12 cm to the left of right lens D) 46 cm to the left of left lens E) 64 cm to the left of right lens ii) What is the magnification of left lens? ( 5 marks) A) 1.84 B) 1.0 C) – 0.68 D) – 1.84 E) 0.68

iii) Where is the final image formed by these two lenses located? A)10 cm to the right of the left lens B)48 cm to the right of the left lens. C)58 cm to the right of the left lens. D)62 cm to the right of the left lens. E)95 cm to the right of the left lens.

2 iv) What is the total magnification of both lenses combined? (5marks) A) 0.49 B) – 0.68 C) 0.9 D) 0.33 E) – 0.49

Answer 1