Question

If the Sun became cooler but kept the same size, would it emit more ultraviolet light or less ultraviolet light than it does now? Why?

Answer 1

temp dec... Energy dec.. Boltzmann's law

what has less energy? UV or IR?

a bright star looks-->?
a dull star looks->?

Answer 2

UV ?

Answer 3

UV is more energy... thats why bright stars seem violet and dull stars look red..

Answer 4

a candle looks red outside and bluish near the wick.

Answer 5

so it would emit less uv light? if it became cooler?

Answer 6

yes

Answer 7

but why?

Answer 8

\[E\propto T\]->Boltzmann's law

Answer 9

and if the surface temp. didnt change but it grew larger in size.... it would emit more energy each second?

Answer 10

that is slightly different

Answer 11

same total energy but over different surface areas

Answer 12

im only given an option of more or less energy each second...

Answer 13

size is same in the problem though

Answer 14

what?

Answer 15

your problem statement says that the size remains same

Answer 16

no if the temperature didnt change but the sun grew larger

Answer 17

Power changes but total "E" remains same

Answer 18

thats what I thought but I am only given the option of
emit more energy
or emit less energy