Author Question: The apparent brightness of a star is 1.0 10-12 W/m2 and the peak wavelength is 600 nm. Estimate its ... (Read 73 times)

torybrooks · **on:** Jul 29, 2018

The apparent brightness of a star is 1.0 10-12 W/m2 and the peak wavelength is 600 nm. Estimate its distance from us.

A)

0.090 pc
B)

0.90 pc
C)

9.0 pc
D)

90 pc
E)

900 pc

Question 2

Assume a proton in a 1-dim box of width 3.0 fm is in its 1 st excited state. (a) What is its kinetic energy (in eV)? (b) How close (fm) to the wall of the box is the probability density a maximum?

What will be an ideal response?