In the context of the Doppler effect, which of the following is a difference between a blueshift and a redshift?

A) Unlike a redshift, a blueshift is caused by a velocity of recession.
B) Unlike a blueshift, a redshift is based on the Hubble's law.
C) Unlike a redshift, a blueshift is a shift toward shorter wavelengths.
D) Unlike a blueshift, a redshift is based on a light source moving closer to an object.


C

Physics & Space Science

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The mass density of platinum is 21.4 × 103 kg/m3. A platinum wire with a radius of 0.500 mm, 1.20 m long, fixed at both ends has a frequency of vibration for its third harmonic equal to 512 Hz. What is the tension in the wire?

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