An atom in a state with its orbital quantum number l = 1 decays to its ground state (with l = 0). A photon of wavelength 630.000 nm is emitted in the process
When the same process takes place in the presence of an intense magnetic field, the following change in the spectrum is observed. With the magnetic field present, one of the emitted lines observed now has a wavelength of 630.030 nm. Which of the following wavelengths would you expect to be also present?
A) 630.060 nm
B) 629.970 nm
C) 630.090 nm
D) 629.910 nm
E) 630.120 nm
B
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The lowest-pitch tone to resonate in a pipe of length L that is open at both ends is 200 Hz. Which one of the following frequencies will NOT resonate in the same pipe?
A) 400 Hz B) 600 Hz C) 800 Hz D) 900 Hz E) 1000 Hz
Which of the following is true about the ages and masses of spiral and elliptical galaxies?
A) Ellipticals are all older and more massive than spirals. B) Spirals are older, and much more massive than ellipticals. C) Both types are about the same age, but spirals vary less in mass. D) Spirals are younger and much more massive than any elliptical. E) Ellipticals are older, and show a far wider range of masses than do spirals.
The region in the H-R Diagram where evolved, low mass stars are converting helium to carbon in their cores is the ________
Fill in the blank(s) with correct word
Strictly speaking, Newton's law of universal gravitation, F = Gm1m2/r2, is valid only if the masses are either point masses or ________.
What will be an ideal response?