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In the figure shown a converging lens an...

In the figure shown a converging lens and a diverging lens of focal lengths 20cm and -5cm respectively are separated by a distance such that a paralel beam of light of intensity 100 `watt//m^(2)` incident on the converging lens comes out as parallel beam from the diverging lens. Find the intensity of the outgoing beam in `watt//m^(2)`

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