Problem 1:
Five laser sources transmit plane waves to an optical receiver, as shown below. Each laser produces intensity of 1e W/m2 at the receiver.
![122_Estimate the total power detected by the detector.png](https://secure.tutorsglobe.com/CMSImages/122_Estimate%20the%20total%20power%20detected%20by%20the%20detector.png)
a) estimate the total power detected by the detector
b) what is the collected power if the lens is removed and the detector is placed directly in the receiver plane?