Lenses (AQA GCSE Physics): Flashcards
📚Flashcards
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15 cards from this deck
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Practise the cards
15 cards from this deck
What process do lenses use to bend light?
What process do lenses use to bend light?
Refraction
Shape of convex lens
Shape of convex lens
Thicker in middle, thinner at edges
What convex lenses do to light rays
What convex lenses do to light rays
Bend them towards each other
Shape of concave lens
Shape of concave lens
Thinner in middle, thicker at edges
What concave lenses do to light rays
What concave lenses do to light rays
Bend them away from each other
Example device using convex lens
Example device using convex lens
Magnifying glass
Example use of concave lens
Example use of concave lens
Spectacles for short-sighted people
Principal focus of convex lens
Principal focus of convex lens
Point where parallel rays meet
Focal length definition
Focal length definition
Distance from lens centre to principal focus
Thick lens has what type of focal length?
Thick lens has what type of focal length?
Short focal length
Real image characteristic
Real image characteristic
Can be projected onto a screen
Which lens type can make real images?
Which lens type can make real images?
Convex lens
Virtual image characteristic
Virtual image characteristic
Can see but cannot be projected onto screen
Which lens always makes only virtual images?
Which lens always makes only virtual images?
Concave lens
Where parallel rays go through convex lens
Where parallel rays go through convex lens
Through the principal focus