Diverging Lenses (Leaving Cert Physics): Flashcards
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13 cards from this deck
Shape of diverging lenses
Shape of diverging lenses
Concave, thinner in centre, thicker at edges
Effect of diverging lenses on parallel light rays
Effect of diverging lenses on parallel light rays
Cause rays to spread out (diverge)
Type of image formed by diverging lenses
Type of image formed by diverging lenses
Always virtual
Ray through optic centre of diverging lens
Ray through optic centre of diverging lens
Passes straight through without bending
Parallel ray to principal axis in diverging lens
Parallel ray to principal axis in diverging lens
Appears to come from focal point on same side as object
Ray towards focus in diverging lens
Ray towards focus in diverging lens
Emerges parallel to principal axis
Characteristics of image by diverging lens
Characteristics of image by diverging lens
Virtual, upright, diminished, same side as object
Lens equation formula
Lens equation formula
Sign of focal length for diverging lens
Sign of focal length for diverging lens
Negative
Sign of image distance for virtual images
Sign of image distance for virtual images
Negative
Sign of object distance in lens formula
Sign of object distance in lens formula
Always positive
Main use of diverging lenses in spectacles
Main use of diverging lenses in spectacles
Correcting short-sightedness (myopia)
Use of diverging lenses in doors
Use of diverging lenses in doors
Peepholes to provide wide field of view