Question

Two thin lenses of focal lengths +10 cm and -5 cm are put in contact. The resultant power of the combination is

Answer 1

The two basic modes of communication are:

Point-to-point communication

Broadcast communication

In amplitude modulation, the amplitude of the carrier wave is varied in accordance with the amplitude of the modulating wave. 

Let, the carrier wave be given by, 

Modulating signal is given by, 

Answer 2

i think p= -10diopter