Lenses (Edexcel GCSE Physics): Flashcards
📚Flashcards
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14 cards from this deck
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Practise the cards
14 cards from this deck
How lenses form images
How lenses form images
By refracting light
Other name for converging lens
Other name for converging lens
Convex
Other name for diverging lens
Other name for diverging lens
Concave
Converging lens effect on parallel rays
Converging lens effect on parallel rays
Makes them converge at principal focus
Diverging lens effect on parallel rays
Diverging lens effect on parallel rays
Makes them spread out (diverge)
Real image
Real image
Light rays actually come together
Can real images be projected?
Can real images be projected?
Yes, onto a screen
Example of real image
Example of real image
Image formed on retina
Virtual image
Virtual image
Rays appear from different location, don't actually meet
Can virtual images be projected?
Can virtual images be projected?
No, cannot be projected onto screen
Example of virtual image
Example of virtual image
Image seen through magnifying glass
Focal length
Focal length
Distance from lens to principal focus
Lens power vs focal length
Lens power vs focal length
More powerful lens has shorter focal length
Effect of increased curvature on lens
Effect of increased curvature on lens
More powerful, shorter focal length