A hydrogen atom makes a transition from the n = 8 to the n = 3 state. The wavelength of the emitted photon is closest to which one of the following values? (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A) 9.57 × 10-7 m
B) 1.13 × 10-6 m
C) 3.12 × 10-7 m
D) 4.52 × 10-6 m
E) 6.34 × 10-7 m
A
You might also like to view...
Suppose that, for some unknown reason, the core of the Sun suddenly became hotter and the rate of nuclear fusion thereby increased. What would happen next?
A) The Sun would quickly run out of hydrogen, causing the temperature to return to its original value. B) The rate of fusion would almost instantly skyrocket, causing the Sun to explode. C) The temperature would continue to increase, causing higher and higher fusion rates. D) The core would expand, reducing the pressure and temperature, and the rate of fusion would decrease until it returned to its original level.
All wavelengths of light travel at the same speed in a vacuum, and carry the same energy per photon
Indicate whether the statement is true or false
A television advertisement claiming that a product is light-years ahead of its time does not make sense because ________
A) light-years can only be used to talk about light B) it doesn't specify the number of light-years C) it uses "light-years" to talk about time, but a light-year is a unit of distance D) a light-year is an astronomically large unit, so a product could not possibly be so advanced
Most active galactic nuclei are found at large distances from us, with relatively few nearby. What does this imply?
A) Supermassive black holes existed only when the universe was young, and no longer exist today. B) Active galactic nuclei can form only at large distances from the Milky Way. C) Active galactic nuclei exist tend to become less active as they age. D) The jets seen in many active galactic nuclei must cause them to move far away from us.