3. The sun is setting in the west, and you look straight up into a clear sky. Th

Question

3. The sun is setting in the west, and you look straight up into a clear sky. The E vector of the scattered li you see is: A. In the north-south direction. C. In the vertical direction. E. Randomly oriented in space. B. In the east-west direction. D. Randomly oriented in a horizontal plane. F. Zero 4. At a distance of 5.0 m from a light bulb that emits EM radiation with average power 60 W, what is the rms value of the electric field? Assume the bulb radiates equally in all directions. A. 0.19 V/m E. 0.19 W/m2 B. 6.0 V/m F. 6.0 W/m2 C. 2.4 V/nm G. 2.4 W/m2 D. 8.5 V/m H. 8.5 W/n 5. Which is true concerning a convex mirror and a real object? A. It can form a real image The mirror B. # must be spherical in shape. C. The image will always be inverted relative to the object D. It produces a larger image than does a plane mirror for the same object distance. E. The image it produces is closer to the mirror than it would be in a plane mirror for the same object dista

Explanation / Answer

3) correct option is (A)

4) r = 5m , P = 60 W
I = P/A
I = eoErms^2*C
60/(4*3.14*5^2) = 8.85*10^-12*Erms^2*3*10^8
Erms = 8.5 V/m
correct option is (D)
5) C

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.