Calculate the wavelength of radiation emitted when an electron falls from the n = 5 to n = 2 state in hydrogen. Is this light in the visible region of the electromagnetic spectrum? If it is, estimate its color. If it is not, what portion of the electromagnetic spectrum does it fall in?

Solution:

Given:

initial orbit of electron=

final orbit of electron=

to find wavelength we use Rydberg equation:

   1/λ

where R is Rydberg constant and it's value is

inserting all the values in formula

 1/λ

  λ

for it's region and color look at given attached pictures

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

i guess it’s a and b