The wavelengths in the hydrogen spectrum with m=1 form a series of spectral lines called the Lyman series. Calculate the wavelengths of the first four members of the Lyman series.
λ1 = 121 nm , λ2 =102 nm , λ3 =97.2nm , λ4=94.9
A -diameter oil droplet is observed between two parallel electrodes spaced apart. The droplet hangs motionless if the upper electrode is more positive than the lower electrode. The density of the oil is .
a. What is the droplet’s mass?
b. What is the droplet’s charge?
c. Does the droplet have a surplus or a deficit of electrons? How many?
Your friend flies from Los Angeles to New York. She carries an accurate stopwatch with her to measure the flight time. You and your assistants on the ground also measure the flight time.
a. Identify the two events associated with this measurement.
b. Who, if anyone, measures the proper time?
c. Who, if anyone, measures the shorter flight time?
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