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1.A light day is the distance light travels in one day. The planet Neptune is 4.5...

1.A light day is the distance light travels in one day. The planet Neptune is 4.5 x 1012 m from the Sun. Which of these is the approximate distance between the Sun and Neptune in light days?

2.The rms value of the magnetic field in an electromagnetic wave is 3.7 x 10-5 T. Calculate the maximum value of the electric field in the wave.

3.A light bulb emits light uniformly in all directions. At a distance of 0.6 meters from the bulb the maximum strength of the electric field in the light from the bulb is 28.9 N/C. Calculate the average power radiated by the light bulb.

4.An object is placed 6 cm away from a mirror of focal length 11 cm. Calculate the image distance.

5.A woman stands 2.5 meters from a convex mirror with focal length -1.4 meters. If she is 1.7 meters tall, calculate the height of her reflection.

6.A light ray in air is incident onto a liquid surface at 58 degrees. If the refraction angle of the light in the liquid is 31 degrees, calculate the index of refraction of the liquid.

7.The critical angle between a gemstone and air is 30.9 degrees. Which of the following is the speed of light in the gemstone?

8.Light of wavelength 590 nm is shone through a double slit. The angle that locates the third dark fringe is 14.2 degrees. Calculate the angle that locates the first dark fringe.

9.On the day his daughter is born, Jack leaves her on Earth and departs on a spaceship to travel around the universe at a constant speed of 0.91c. He returns to Earth on the day of his daughter's 7th birthday. Calculate the duration of the trip as measured by Jack.

10.A spaceship travels to Planet X at 0.98c. As measured by the crew of the ship, the distance from Earth to Planet X is 7.5 light years. Calculate the distance between Earth and Planet X as measured on Earth.

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Homework Answers

Answer #1

1)

Speed of light

Total time in a day

Distance in light day

Answer 2

RMS magnetic field is given

So maximum magnetic field

Maximum electric fiels

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