When an object is placed 20 cm from a diverging lens, areduced image is formed.

Question

When an object is placed 20 cm from a diverging lens, areduced image is formed. Which one of the following statements isnecessarily true?

a. The focal length of the lens may beless than 20 cm.
b. The image is inverted.
c. The image could bereal.
d. The refractive power of the lens mustbe greater than 0.05 diopters.
e. The image distance must be greater than 20 cm. When an object is placed 20 cm from a diverging lens, areduced image is formed. Which one of the following statements isnecessarily true? The focal length of the lens may beless than 20 cm. The image is inverted. The image could bereal. The refractive power of the lens mustbe greater than 0.05 diopters. The image distance must be greater than 20 cm.

Explanation / Answer

i think the option A is most correctbecause when the object is placed before the focal lenbgth then it isunderstood that it will be real but less than the actuallsize

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