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CBSE Notes 2011-2012

Which of the following lenses would you prefer to use while reading small letters found in a diction...

Multiple choice question

Which of the following lenses would you prefer to use
while reading small letters found in a dictionary ?

unknown

A convex lens of focal length 50 cm

unknown

A concave lens of focal length 50 cm

unknown

A convex lens of focal length 5 cm

unknown

A concave lens of focal length 5 cm.