Light passes through a single slit of width 8.32x10^-5 m. The first (m=1) diffraction minimum occurs at an angle of 0.347. What is the wavelength of the light in nanometers? (Hint: The answer will be between 400 and 700 nm.)

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.