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Lenses marker's formula
1/f = (n - 1) [ 1/ R1 - 1/R2 ]
Sign convention , the heights below the principal axis are _____
negative or minus
the front portion of the eye is covered by a tough, transparent membrane
cornea
two transparent liquids contains human eye are
aqueous humour and vitreous humour
The pupil automatically contracts in ------- light
bright
------- are attached to the eye lens.
The ciliary muscles
The light sensitive area of the cells, at the back of the eye is ----
the retina
For normal person, the least distance of distinct vision is
25 cm
Due to an eyeball is too short or due to the eye - lens cannot be sufficiently convex can be caused
farsightedness or hyperopia
Myopia can be corrected by using spectacles with ------- lenses.
concave
A magnifying glass that has a bi-convex lens with a short focal length is a
simple microscope
A compound microscope has at least two convex lenses; an ---- lens and an ----- lens.
objective / eyepiece
In compound microscope, a --------------- mounted beneath the slides can be adjusted to give reflected light to object.
concave mirror
In compound microscope, the objective lens produces an image which is -----, --- and ------ the size of the object.
real, inverted , larger than
Formula of magnifying power of compound microscope is
MP = vo / uo ( 1 + D/ f e )
In normal adjustment, the final image is at ----
infinity
