Question

you have two lenses a and before Clans + 10 cm and minus 10 cm respectively state the nature and power of each lens which of the two lines will form of ritual and magnified image of an object placed 8cm from the lens draw the ray diagram​

Answer 1

given,

focal length of lens A is +10 cm.

focal length of lens B is -10 cm.

Finding power of lens A

P = 1/F (in m)   then P = 100/F (in cm)

P = 100/+10 = +10 d, and this lens is convex lens.

Finding power of lens B

P = 1/F (in m)   then P= 100/F (in cm)

P = 100/-10 = -10 d, and this lens is concave lens.

           

                                           I hope this is helpful..............