s2w2 Doppler shifts, scattering, reflecting, and transparency

Review q - How can you tell what kind of gas is emitting light?

review q - Given that water absorbs microwaves very strongly, explain why the inside of a poptart gets significantly hotter than the crust around it?

What is the difference between emission and absorption in terms of what happens to an electron in an atom?

Watch about Rayleigh scattering do you have any questions?

Light is created by

If you add two waves that are 1/2 wavelength off each other they

Read 3.6-3.7 - do you have any questions?

Think about how an ambulance sounds when it is sitting still. Then think about how different the ambulance sounds when it passes by. (you can listen to it here) how would describe the difference

Using the doppler shift, we should be able to tell if a star is moving

What does the atmospheric window refer to?

in what way is the atmospheric window very good for us?

In what way is the atmospheric window bad for astronomers

What is the astronomers solution to this problem?

Watch this video about why glass is transparent.

Do you have any questions?

Radio waves are higher energy or lower energy than visible light?

Radio waves are likely to have enough energy to make electrons to jump to the next level

Can a radio work in a room with no windows? What does that tell you about how transparent the walls are to radio waves?

UV radiation is higher energy or lower energy than visible light?

True or false, UV radiation are more likely to have enough energy to make electrons to jump to the next level compared to visible light

Have you ever gotten a sunburn when sitting inside next to a window?

What do you think this means about glass, transparency and UV radiation?

What do you think happens to the energy of the light that is absorbed and not reflected or transmitted by a solid?

How are you feeling about this?