Which of these is the classic continuous spectrum?

A) sunlight
B) a rainbow
C) a neon light
D) a fluorescent light
E) a glowing nebula, such as M-42


B

Physics & Space Science

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Tycho Brahe's contribution to Kepler's Laws of Planetary Motion was:

A) his detailed and accurate observations of the planet's position. B) his observations of Jupiter's moons. C) a mathematical explanation of epicycles. D) a precise lunar calendar. E) the correct explanation of lunar phases.

Physics & Space Science

The addition of salt to water affects its

A) crystal composition. B) freezing point. C) viscosity. D) liquidity. E) none of the above

Physics & Space Science

A simple pendulum is suspended from the ceiling of a stationary elevator, and the period is measured. If the elevator accelerates upward, the period

1.increases. 2.decreases. 3.remains the same.

Physics & Space Science

In the He-Ne laser, the lasing transition goes from the 20.66 eV state in Ne to a lower state. The wavelength of the laser photons is 633.0 nm. What is the lower state of the lasing transition?

A. the He ground state B. the Ne ground state C. the 20.61 eV excited stated of He D. the 18.70 eV excited state of Ne E. the 4.660 eV excited state of Ne

Physics & Space Science