Lenses (Edexcel GCSE Physics Combined Science): Flashcards
📚Flashcards
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13 cards from this deck
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Practise the cards
13 cards from this deck
How do lenses form images?
How do lenses form images?
By refracting light and changing its direction
Alternative name for converging lens
Alternative name for converging lens
Convex lens
Alternative name for diverging lens
Alternative name for diverging lens
Concave lens
Effect of converging lens on parallel rays
Effect of converging lens on parallel rays
Causes them to converge at the principal focus
Effect of diverging lens on parallel rays
Effect of diverging lens on parallel rays
Causes them to diverge/spread out
Principal focus of converging lens
Principal focus of converging lens
Point where parallel rays meet
Principal focus location for diverging lens
Principal focus location for diverging lens
Behind the lens (where rays appear to come from)
Real image definition
Real image definition
Light rays actually converge to form the image
Can real image be projected on screen
Can real image be projected on screen
Yes
Virtual image definition
Virtual image definition
Rays appear to come from different location; don't meet
Can virtual image be projected on screen
Can virtual image be projected on screen
No
Focal length definition
Focal length definition
Distance from lens to principal focus
Relationship between lens power and focal length
Relationship between lens power and focal length
More powerful lens has shorter focal length