Duration: 5:12

18 views

0

Screen \( S \) is illuminated by two point sources \( A \) and \( B \). Another source \( C \) sends a parallel beam of light towards point \( P \) on the screen (see figure). Line \( A P \) is normal to the screen and the
\( \mathrm{P} \) lines \( A P, B P \) and \( C P \) are in one plane. The distances \( A P, B P \)

W and \( C P \) are in one plane. The radiant powers of sources \( A \) and \( B \) are \( 90 \mathrm{~W} \) and \( 180 \mathrm{~W} \) respectively. The beam from \( C \) is of intensity \( 20 \mathrm{~W} / \mathrm{m}^{2} \). Calculate intensity at \( P \) on the screen.
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live