Question

For the same thickness of the lens, if the radius of curvature is increased, the focal length will
d. be imposible to estimate,
a. reduced. b. remain unchanged.
c. increased.
At what distance a watch maker must hold his lens from the watch?
2. at the focal length
b. at less than focal lengh
c. at more than the focal length d. at zero distance
Exercise :
explain the working of compound microscope by focal length of convex lens.
'hen would virtual image produced by convex lens ? Why doesn't virtual image drawn on a
Teen?
e your opinion about radius of curvature of a convex lens having different F, and F,? What
uld the lens called having equal F, and F, ?​

Answer 1

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