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# 1 across a anerator be current of ints resistance 3 mH, and maximum r frequency in the cir- ints across the ints across the ints across the What is

need help with 12-14 starting at "The magnetic field amplitude of an electromagnetic wave is 4.2 × 10−6 T. The speed of light is 2.99792 × 108 m/s."

1 across a anerator be
current of ints
resistance 3 mH, and
maximum r frequency in the cir- ints
across the ints
across the ints
across the What is the frequency of an X-ray with a
wavelength of 1.4 nm?
Answer in units of Hz. 012 (part 1 of 2) 10.0 points
The magnetic ﬁeld amplitude of an electro-
magnetic wave is 4.2 X 10‘6 T.
The speed of light is 299792 x 108 m/s.
Calculate the amplitude of the electric field
if the wave is traveling in free space.
Answer in units of N / C. 013 (part 2 of 2) 10.0 points
Calculate the amplitude of the electric field
if the wave is traveling in a medium in which
the speed of the wave is 0.7 0. Answer in units of N / C. 014 10.0 points
The distance from the Earth to Polaris is
approximately 6.12 X 1018 m. The speed of light is 299792 x 108 m/s. If the North Star Polaris were to burn out
today, in how many years would it disappear
from our vision? Answer in units of years. 015 10.0 points

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