Question

questions 6-11 please help fast​

Answer 1

6) Answer

15 cm

Explanation

F =Centre of curvature/2

F=30/2

Therefore, F=15cm

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7)Answer:

Real, enlarged, inverted

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8) Answer:

50 cm

Explanation

Peq.=P1+P2

=4D-2D

=2D

Feq.=1/Peq.

=1/2

=0.5m

0.5 X 100 = 50cm

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9) Answer

1/F=1/f1+1/f2+1f3

So, P= P1+P2+P3

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10)Answer

4 cm

Explanation

We have, u= -3 cm and f= - 12 cm

Also,. 1/v+1/u=1/f

or. 1/v=1/f - 1/u

=-1/12 - ( - 1/3) = 1/f

=f=4cm

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