Lenses

Flashcard
•
Physics
•
11th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a convex lens?
Back
A convex lens is a lens that is thicker in the middle than at the edges, causing light rays that pass through it to converge.
2.
FLASHCARD QUESTION
Front
What is a concave lens?
Back
A concave lens is a lens that is thinner in the middle than at the edges, causing light rays that pass through it to diverge.
3.
FLASHCARD QUESTION
Front
What is the principal focus of a lens?
Back
The principal focus is the point where parallel rays of light either converge (in a convex lens) or appear to diverge from (in a concave lens).
4.
FLASHCARD QUESTION
Front
What type of image is formed by a convex lens when the object is beyond the focal point?
Back
A real and inverted image is formed when the object is beyond the focal point.
5.
FLASHCARD QUESTION
Front
What type of image is formed by a concave lens?
Back
A concave lens always forms a virtual, upright, and reduced image.
6.
FLASHCARD QUESTION
Front
What is the difference between real and virtual images?
Back
Real images can be projected on a screen and are inverted, while virtual images cannot be projected and are upright.
7.
FLASHCARD QUESTION
Front
What is the formula for the lens maker's equation?
Back
1/f = (n - 1) * (1/R1 - 1/R2), where f is the focal length, n is the refractive index, and R1 and R2 are the radii of curvature.
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