Refraction and Lenses
Flashcard
•
Science
•
6th - 8th Grade
•
Hard
Barbara White
Used 1+ times
FREE Resource
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20 questions
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1.
FLASHCARD QUESTION
Front
Refraction Noun
[ree-frak-shun]
Back
Refraction
The change in direction of a wave as it changes speed when moving from one medium to another.
Example: Light bends when it enters water from air, changing direction due to speed change.
2.
FLASHCARD QUESTION
Front
Medium Noun
[mee-dee-um]
Back
Medium
A substance, such as air, glass, or water, through which a wave can travel and be transmitted.
Example: Light bends when it passes from air into water, showing how a medium affects wave direction.
3.
FLASHCARD QUESTION
Front
Virtual Image Noun
[vur-choo-ul im-ij]
Back
Virtual Image
An image that forms where light rays appear to originate but do not actually converge or meet.
Example: Light rays reflect off a mirror, creating a virtual image that appears behind the mirror.
4.
FLASHCARD QUESTION
Front
Index of Refraction Noun
[in-deks uv ree-frak-shun]
Back
Index of Refraction
A measurement of how much a transparent material slows down the speed of light passing through it.
Example: Light bends when it moves from air to water, showing how materials slow down light.
5.
FLASHCARD QUESTION
Front
Normal Noun
[nor-mul]
Back
Normal
An imaginary line drawn perpendicular to a surface at the point where a light ray strikes it.
Example: The image shows a light ray hitting a mirror, with a 'normal' line perpendicular to the surface, illustrating reflection.
6.
FLASHCARD QUESTION
Front
Lens Noun
[lenz]
Back
Lens
A transparent object, with at least one curved side, that refracts light to form an image.
Example: The image shows how eyeglass lenses refract light to focus it on the eye.
7.
FLASHCARD QUESTION
Front
Convex Lens Noun
[kon-veks lenz]
Back
Convex Lens
A lens that is thicker in the middle and causes parallel light rays to come together, or converge.
Example: A convex lens focuses parallel light rays to a single point, demonstrating convergence.
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