Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


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
remaining cards
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:
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

Optics lesson 1

What is light? Light is a form of energy
What is rectilinear propagation of light? Light always travels in a straight line
Ray model of light light is represented by a straight line or ray
What do you mean by transmit? Pass through
What do you mean by reflect? Bounce back into the same medium
What do you mean by absorb? Get trapped in it
What is a transparent material? Allows light to pass through freely. Only a small amount of light is absorbed or reflected
What is a translucent material? allows most rays to pass through, but the rays are scattered in all directions
what is an opaque material? Prevents any light from passing through it. it will only absorb or reflect light
what is a shadow? A shadow is an area where direct light from a light source cannot reach due to obstruction by an object.
what is the relationship between the size of shadow and distance of object from light source? the farther an object from a source of light, the smaller its shadow will be
give example of transparent material clear glass
give example of opaque material mirror
give example of translucent material wax paper
Created by: akhehra