The lowest energy level an electron can occupy is called the _____
A) ground state
B) ionization level
C) redshift
D) Doppler shift
A
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Resolution: In one particular case, the limiting angle of resolution for an eye is 1.4 × 10-4 rad. What is the minimum separation between two point sources of light that the eye can distinguish if they are at a distance of 40 m from the observer?
A. 2.8 mm B. 5.6 mm C. 1.4 mm D. 8.4 mm E. 4.7 mm
Laplace's nebular hypothesis was problematic in that he could not explain ____
a. the different types of planets b. the rotational direction of the planets c. how the Sun had <0.5% of the Solar System's angular momentum d. how one star could come within a close encounter of another star e. how gravity was the dominant force of planet formation
For a transverse mechanical wave, the particle motion is
a. both parallel and perpendicular to the direction of the wave velocity. b. parallel to the direction of the wave velocity. c. perpendicular to the direction of the wave velocity. d. in all directions.
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