Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
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

ch. 27 notes

QuestionAnswer
what are sources of light ? sun, lamp filament , candle , glowing gases
what materials are transparent? glass, air, water
what materials are opaque? wood, metal
what materials are transluscent? thin paper, frosted glass
what do scienctists now agree on light? that light has a dual nature, part wave and part particle
what was enestiens theory ? light consists as particles , photons that move as waves
what is the speed of light ? 300,000 km/s
michelson recieved a noble prize in physics for what? for using a spinning mirror apparatus and found the same value for light
how long does it take the light from the sun to reach the earth? 8 minutes
Created by: hkramer