10. The sun's electromagnetic radiation peaks at the wavelength λ = 555 nm. What is the frequency f of this radiation? a) 3.5 X 10¹4 Hz b) 8.2 X 10¹5 Hz c) 5.4 X 10¹4 Hz d) 2.4 X 10¹4 Hz e) 7.3 X 10¹5 Hz

19. A laser uniformly illuminates an area with green light that has an average intensity of 550 W/m2. What is the rms value of the electric field of this light? A) 322 N/C B) 405 N/C C) 455 N/C D) 643 N/C E) 891 N/C Ans: C

Which of the following correctly orders electromagnetic waves by increasing frequency? a. radio, visible, infrared, x-ray   b. infrared, ultraviolet, visible, gamma   c. visible, infrared, ultraviolet, x-ray   d. infrared, visible, x-ray, gamma

Problem 5. Assume that electromagnetic propagation through space is what we have been calling "free space." b) How long does it take to communicate with electromagnetic waves from Mars to Earth? Another way of asking this question is how long does it take for an electromagnetic signal originating on Mars to reach Earth? c) for two humans separated by 6 feet, how long does it take for the light reflected off of one person to be seen by the other person?

4. What is the intensity of an electromagnetic wave with a peak electric field strength of 110 V/m?     This is not and will not be graded

6. List the electromagnetic waves in order of increasing frequency.   a. radio waves,gamma rays,visible light,microwaves,ultraviolet rays,X-rays,infrared rays   b. radio waves,microwaves,ultraviolet rays,gamma rays,X-rays,visible light,infrared rays   c. radio waves,microwaves,infrared rays,visible light,ultraviolet rays,X-rays,gamma rays   d. radio waves,gamma rays,X-rays,infrared rays,ultraviolet rays,visible light,microwaves   e. radio waves,gamma rays,visible light,ultraviolet rays,infrared rays,X-rays,microwaves

36.) Which of the following is true of electromagnetic waves?a. The frequency is the number of vibrations needed to produce a wavelength. b. As the frequency increases, so does the wavelength. c. The frequency of an electromagnetic wave equals the frequency of the vibrating charge that produces the wave.

11.

4. A spotlight shines onto a square target of area 0.35 m?. If the average rms strength of the magnetic field in the EM waves of the spotlight is 1.2 x 107 T, calculate the energy transferred to the target if it remains in the light for 12 minutes. (Give answer in joules) F3 FB #3 2$ 4 & * 2 3 5 8 9 W E T U K

An electromagnetic wave is allowed to reflect from a mirror in a measurement of radiation pressure.  If Erms is doubled while the wave frequency is cut in half, then the radiation pressure will  a. remain the same.  b. quadruple. c. double. d. be cut in half.