Astronomers determine that a particular star in our galaxy is moving toward Earth at a speed of 722.0 km/s with respect to the Earth. If Earth receives a wavelength ? = 682.1 nm from this star, what was the wavelength emitted by the star? ____________ nm

MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A pulsar is a type of rotating neutron star that emits a beam of electromagnetic radiation. Imagine a pulsar that is moving toward Earth at a speed of 856.500 km/s. It emits mostly radio waves with a wavelength (at the source) of 132.500 cm. What is the observed wavelength of this radiation on Earth? (Assume the Earth is stationary. Consider the speed of light c = 3.00000 × 108 m/s. Give your answer to at least six significant figures.) 4.0 133 What relationship describes the frequency of a wave for an observer that is moving relative to the source? What is the relationship between frequency and wavelength? cm

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A local radio station broadcasts radio waves at 99.7 MHz. Unlike sound, radio waves can pass into outer space, because they are disturbances not in air molecules but in the e-m fields that exist even in the vacuum of space. It's energy traveling independent of matter. a. When that radio wave hits you, how many pulses (wave crests) of em radiation hit you per minute (60 seconds)? (reminder: M = 10 6) b. Radio waves move at the speed of light (c), how far apart is each wave crest (wavelength)? c. If we boosted the signal strength so that station could be heard on the moon, would either the wavelength or frequency change?

If light from the closest star to our solar system takes about 4.2 years to get to us, how far is that star in units of gigameters? Explain work

under normal conditions, humans radiate electromagnetic waves with a wavelength of about 9.0 microns. a) what is the frequency of these waves b) to what portion of the electromagnetic spectrum do these waves belong? f=( speed of light )/wavelenght

What is the energy of light having a frequency of (4.79x10^14)? Answer to 3 significant figures in scientific notation. Unit is case sensitive. 4 Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: Answer x10 units

Heading 2 Comic San. 12 + 三 . | I1 I|| I 2 |. 3. 8. Fill in the blanks about the electromagnetic spectrum using the figure below: The electromagnetic spectrum Radio Microwave Infrared Visible Ultraviolet X-ray Gamma ray Long wavelength Short wavelength Low energy High energy Low frequency High frequency a. Frequency and wavelength have a(n)_ _, wavelength relationship. This means as frequency b. Frequency and energy have a(n) relationship. This means as frequency energy

If the speed of light is 3×108 meters/second and the wavelength of an infrared wave used in a remote control is 7×10−9 meters, then what is its frequency? A. 4×1016 Hz B. 4×10−2 Hz C. 2×100 Hz D. 2×10−17 Hz

An astronomer looking at a star's spectrum sees a bright emission line at 27.0e3GHz. What is the wavelength of the electromagnetic radiation creating the bright line in nanometers?