Chapter 27 Physics
Help!
|
|
||||
|---|---|---|---|---|---|
| show | light is the only thing you see, all visible objects either reflect or emit light, most of what we see is reflected light
🗑
|
||||
| what are sources of light? | show 🗑
|
||||
| show | some materials let light pass through-transparent (glass, air, water)
most things don't let light pass at all-opaque (wood, metal)
🗑
|
||||
| what is translucent? | show 🗑
|
||||
| show | it has a dual nature, part particle and part wave
🗑
|
||||
| show | light has been studied for thousands of years, greek philosophers thought it was particles that entered the eye and created vision others-streamers or filaments emitted from eye made contact with objects
🗑
|
||||
| what did newton think? | show 🗑
|
||||
| show | light was waves and beams could pass through each other like waves do but people still believed newton
🗑
|
||||
| what did t young do? | show 🗑
|
||||
| show | photo electric effect, consists of particles (mass less bundles of electromagnetic energy packaged in bundles called photons) move as waves
🗑
|
||||
| show | discovered speed of light to be 300,000 km/s, using spinning mirror, 1st american-nobel prize
🗑
|
||||
| what did galileo do? | show 🗑
|
||||
| show | astronomer who studied moons of jupiter to learn about speed of light
🗑
|
||||
| what is the speed of light? | show 🗑
|
||||
| show | around earth 7.5 times in one second, 8 minutes for light from the sun to reach earth, 4 years for light from the nearest star (AlphaCentauri), the distance light can travel in one year at 300,000km/s is called a lightyear
🗑
|
||||
| what is the electromagnetic spectrum? | show 🗑
|
||||
| what is light? | show 🗑
|
||||
| show | a wave that is partly magnetic and partly electric-electromagnetic wave, light is only one kind of electromagnetic wave, range-electromagnetic spectrum
🗑
|
||||
| helpful hints-electromagnetic spectrum | show 🗑
|
||||
| what is the lowest frequency of light we can see? highest? | show 🗑
|
||||
| show | they all travel at the same speed-the speed of light, but they are different in their frequencies and wavelengths
🗑
|
||||
| what is infrared? | show 🗑
|
||||
| what is ultraviolet? | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
distler
Popular Physics sets