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WorksheetsLight and Optics ELO 3
Total questions: 32
Worksheet time: 20mins
What happens to the light that passes through cornea?
it gets reflected.
it gets shattered.
it gets refracted.
what is the function of iris in the eye?
it detect colours.
it focuses the light.
it controls the size of pupil.
why pupil gets smaller in bright light?
to get as much light as possible.
to prevent damaged to eye due to bright light.
to make sure light gets refracted.
The image formed on the retina is _____________
upside
upside down
rotated at 90 degrees angle.
The transparent covering of eye is called ___________.
pupil
iris
cornea
Which part of the camera focuses light?
sensor
shutter
lens
special cells in the retina change the light energy into electrical impulses called ___________
optic impulses
nerve impulses
connective impulses
Nerve impulses are sent to the brain along the _____________
optic nerve
nasal nerve
pulmonary nerve
The retina of the eye has how many specialised cells?
three
four
two
What is the function of rod cells?
to detect colours in bright light.
to detect colours in dim light.
to detect secondary colours.
What is the function of cone cells?
to detect colours in dim light.
to detect secondary colours in dim light.
to detect colours in bright light.
What are the three primary colours?
red, purple, yellow
red, green, blue
red, yellow, black
Which one of the following is true both for human eye and digital camera?
the sensor detects light.
the aperture controls the amount of light that enters.
the lens focuses the light.
What is the function of the optic nerves?
To control the movement of our eyes
To connect our eyes to our brain
To help us see colors
To regulate the amount of light
Why do some people have blurry vision?
because the back of their eye is too far or close, and the image they see is not focused
because their eye is broken so they can't see
because they put too many eye drops in their eyes and now they have milk in the back of their eyeball
If your vision problems can be corrected by a convex lens, you:
Having trouble seeing nearby objects
Having trouble seeing faraway objects
Having trouble telling whether objects are close up or far away
Having blind spots at the edges of your vision
Which of the following statements is true of nearsighted people?
their retinas that are slightly misshapen
they have trouble seeing nearby objects
their vision problems can be corrected with convex lenses
the lenses of their eyes focus light in front of their retinas
Laser surgery:
changes the shape of your cornea
changes the distance between your cornea and retina
changes the size of your lens
places an invisivle lens in front of your eye
The defect of vision in which the person is able to see distant object distinctly but cannot see nearby objects clearly is called
far-sightedness
near-sightedness
presbyopia
All of above
Eye Problem where close objects may be distorted or blurry
Astigmatism
Farsighted
Nearsighted
Glaucoma
