CONVERGING LENS

DIVERGING LENS

REFRACTION-AIR TO GLASS

REFRACTION-GLASS TO AIR

REFRACTION

REFRACTIVE INDEX

i = 10
r = 6.5
n = ?

i = 20
r = 13
n = ?

REFRACTIVE INDEX

Magnification

1 ÷ (d from o to l) + 1 ÷ (d from l to i)

Iris

Lens

retina

Optic nerve

Eye muscles

Ciliary muscles

Pupil

Cornea

1 ÷ Focal length in metres

TOTAL INTERNAL REFLECTION

AN EXAMPLE OF SOMETHING THAT USES TOTAL INTERNAL REFLECTION

HOW ENDOSCOPE WORKS

THE IMAGE PRODUCED BY A DIVERGING LENS IS

WHEN THE OBJECT IS NEARER TO THE LENS THAN THE PRINCIPAL FOCUS WITH A CONVERGING LENS THE IMAGE PRODUCED IS

POSITION AND NATURE OF IMAGE FORMED BY A LEN DEPENDS ON