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WorksheetsLIGHT GRADE 8
Total questions: 11
Worksheet time: 2mins
Why fingers appear blurred when we move our hand very fast in front of our eyes?
DUE TO PERSISTENCE OF VISION
DUE TO HYPERMETROPIA
DUE TO MYOPIA
DUE TO BLINDNESS
The distance between the object and its image formed by a plane mirror appears to be 18 cm. What is the distance between mirror and the object?
5CM
10CM
9CM
12CM
A ray of light is incident on a mirror at an angle of 40°. What is the angle of reflection ?
45 DEGREE
50 DEGREE
96 DEGREE
40 DEGREE
How is hypermetropia corrected?
using plain mirror
using concave lens
using convex lens
using cooling glass
The angle between the incident ray and reflected ray is 100°. What is the value of angle of incidence?
50 degree
48 degree
33 degree
100 degree
Name the scientist who studied that if a white light is passed through a prism, it splits into different colours.
Albert Einstein
Sir Issac Newton
Robert Hooke
Bengamin Franklin
What is the nature of the image formed by the plane mirror?
up and down
right and left
erect and virtual
all are wrong
Name the liquid found between the cornea and lens.
Water
Aqueous humour
Vitreous humour
Cytoplasm
Name the spot inside the human eye where the image is not visible.
Dark spot
Grey spot
Spectrum
Blind spot
Which element is used at the back of plane mirror?
Foil
Silver
Gold
Steel
Why do hens wake up early than everyone?
More no of rods cells in the eye
more no of of optical nerves in the eye
Because lot sun light falls on the eye of the hen
Due to nore no of Cones cells
