Save
or

or

taken

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.

focusNode
Didn't know it?
click below

Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
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

# Lenses

### Stack #18787

A converging lens is fatter at the centre than at its edge, it will bring together a beam of light, another name for this lens is? A convex lens
A lens that spreads out the beam of light and is thinner in the middle than at its edges is ? A diverging lens
The lens converges the parallel beam through a point called the principal focus, the distance from the lens to this point is called the focal length, what is the formula relating the focal length to the power of the lens? P = 1/f The unit is the dioptre
What is the formula for the refractive index between two materials? sin i/sin r = V1/V2
The equation connecting the distance of an object from the lens and the distance for its image is? 1/u + 1/v = 1/f Where u is the object to lens distance and v the image to lens distance
Created by: stevie

Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

• SPACEBAR - flip the current card
• LEFT ARROW - move card to the Don't know pile
• RIGHT ARROW - move card to Know pile
• BACKSPACE - undo the previous action

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
 "Know" box contains: Time elapsed: Retries:
restart all cards