Solve this: Q.22. Read the following statements and choose the correct option. (A) Only a point source forms a complete umbra. (B) An extended source of light forms both umbra and penumbra. (a) Only A is true (b) Only B is true (c) Both A and B are true (d) Both A and B are false Share with your friends Share 0 Decoder_2 answered this Dear student,A complete umbra is only formed by a point source only as it is only point source which forms a complete dark patch on screen.Also both umbra and penumbra can be formed by an extended source of lightSo both the statements written are correct.Rigth option is (c).Regards 0 View Full Answer