LABS ARE DUE NOW :)
WARM-UP
1. Consider the word, 'void'. What does it mean for a space to be void of matter?
2. A search and rescue worker needs to know the depth of a cave so they can choose the correct length of rope. Which speed should they use to calculate the distance, the speed of Electro-Magnetic waves (aka, speed of light (3x108m/s)) or the speed of sound (343m/s)?
3. If the echo returns to the worker in 1.2 seconds, find the depth of the cave.
CLASSWORK
1. 072A: EM waves & Transparent vs. Opaque - Notes & Practice Questions
Opaque: If an object is opaque, then the vibrations of the electrons in the EM wave are not passed from atom to atom through the bulk of the material. Rather the electrons of atoms on the material's surface vibrate for short periods of time and then reemit the energy as a reflected light wave. Such frequencies of light are said to be reflected.
Transparent: Transparent materials are materials that allow one or more of the frequencies of visible light to be transmitted through them
Is water transparent? Are you sure? Think about the photo of the ocean linked here (LINK) ...what color is missing? (credit to Riley for thinking of this one - GREAT example)
LINK to questions
2. Quiz grading
HOMEWORK
1. If you didn't finish your Lab (due today), finish it over the weekend and turn it in for 80% credit monday.
2. Quiz on Monday
3. Periods 1 & 2, we didn't talk about this, but you should think about it: Is water transparent? Are you sure? Think about the photo of the ocean linked here (LINK) ...what color is missing? (credit to Riley for thinking of this one - GREAT example)