Question

Rectangle ABCDABCDA, B, C, D is graphed in the coordinate plane. The following are the vertices of the rectangle: A(5, 1),A(5,1),A, left parenthesis, 5, comma, 1, right parenthesis, comma B(7,1)B(7,1)B, left parenthesis, 7, comma, 1, right parenthesis, C(7, 6)C(7,6)C, left parenthesis, 7, comma, 6, right parenthesis, and D(5, 6)D(5,6)D, left parenthesis, 5, comma, 6, right parenthesis

Answer 1

Answer:

Power of the source  Po=5 W

Power at the distance r from source,   P=4πr2Po            .....(1)

Each photon emits one electrons.

Also,   P∝N            .....(2)

N is the number of photons (or photo electrons).

From (1) and (2) we get, number of photo electrons   N∝r21

⟹ N1N2=r22r12

Given :  r1=0.5 m     r2=1 m

N1N2=120.52=41

Answer 2

Answer:

Step-by-step explanation:

3