The Doppler formula states that the ratio of the velocity of a source to the speed of light is equal to the ratio of the change in wavelength caused by the Doppler shift to the source wavelength, or A spacecraft has yellow headlights which radiate 600nm photons, and is travelling toward a stationary observer. If the spacecraft is travelling at a velocity of 1% of the speed of light (0.01c), what
will be the amount of the shift in wavelength observed (in nanometers)?
What will be an ideal response?
6 nm
6
6 nanometers
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Determine (a) the temperature at the 16 equally spaced points shown in the accompanying sketch to an accuracy of three significant figures and (b) the rate of heat flow per meter thickness. Assume two-dimensional heat flow and k = 1 W/(mK).
GIVEN
A two-dimensional object with specified surface temperatures
FIND
(a) The temperature at the 16 specified locations
(b) The heat flow per meter thickness
ASSUMPTIONS
Steady state
SKETCH
What does cosmological redshift do to light?
A) stretches its wavelength B) makes it slow down C) makes it brighter D) makes all light infrared
After a ball tossed upward leaves your hand, the force of gravity on it
A) no longer acts. B) gradually diminishes. C) gradually increases. D) remains constant. E) changes direction.
The ___________ hypothesis of the formation of the solar system uses sudden events that drastically alter the form of the early solar system
Fill in the blank(s) with correct word