Question:
Which of the following lenses would you prefer to use while reading small letters found in a dictionary? (a) A convex lens of focal length 50 cm. (b) A concave lens of focal length 50 cm. (c) A convex lens of focal length 5 cm. (d) A concave lens of focal length 5 cm.
Answer:
Actually the answerbis a convex lens of foacal length 5cm.because a convex lens is the lens which gives magnified ,virtual and erect images...also the power of lens is 1/f.so when f is less ..that is 5cm ,power will be more than that of convex lense of focal length 25cm.
I hope i was able to clear ur doubt
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