WorksheetsLight
Total questions: 20
Worksheet time: 20mins
The ray of light which falls on the mirror's reflecting surface is called the
Incident ray
Reflected ray
Normal
Falling ray
Angle i =
Incident ray
Angle r
Angle n
Angle o
The phenomenon due to which a parallel beam of light on striking a smooth and highly polished surface is reflected back as a parallel beam of light is called
Diffused reflection
Regular reflection
Irregular reflection
Refraction
Which of the following is not a luminous object?
Sun
Stars
Electric bulb
Moon
When an object is kept in between two mirrors placed perpendicular to each other, how many images of the object are formed?
2
3
5
0
When a pair of mirrors is placed parallel to each other, how many images are formed?
0
2
Infinite
5
What is refraction of light?
The bouncing back of light in the same medium.
The reflecting of light in various directions on striking on a rough surface.
Bending or change in direction of light as it passes from one medium to another.
Splitting of white light into its component colours on passing through a transparent medium.
A band of seven colours formed when white light passes through a transparent medium is called
Dispersion of light
Refraction of light
Reflection of light
Spectrum of light
When the pigmentation of the iris is the least, the iris is___________ in colour.
Blue
Green
Black
Brown
The outermost covering of the eye made of white tough fibrous tissues is
Cornea
Sclera
Retina
Choroid
At the junction of the optic nerve and the retina, no vision is possible because of no sensory cells at that spot. Name that spot.
Blind spot
Junction spot
Sensory spot
Suspensory spot
What is the function of optic nerve?
It helds the eye lens at proper place.
It carries optical messages in form of electric signals to the brain.
It regulate the amount of light entering the eye.
It lends colour to the eye.
The near point for a normal eye is
30 cm
10 cm
25 cm
Infinite
A person suffering from__________ can see nearby objects but cannot see distant objects clearly.
Myopia
Hypermetropia
Cataract
Presbyopia
The people who cannot see are called
Deaf
Blind
Dumb
Visually challenged
Who invented the Braille system?
Helen Keller
Galileo Galilei
Alexandro Wolta
Louis Braille
Which of the following foods are rich in Vitamin A?
Eggs
Spinach
Broccoli
Potato
Which sensory cells are are sensitive to bright light and can detect colour?
Rods
Cones
What is occupies two-thirds of the volume of eye?
Vitreous fluid
Aqueous humour
Suspensory ligaments
Ciliary muscles
The______________ is a device that produces beautiful patterns when it is rotated because of the multiple reflection of light.
Periscope
Kaleidoscope
Microscope
Telescope
