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Question 1 FILL IN THE BLANKS:
We use __________to see images of ourselves or other objects.
The line drawn perpendicular to the surface of the mirror at the point of incidence is termed as the ____________.
The angle of incidence is ________to the angle of reflection.
The exposed surface of the eyeball has a transparent covering called _________.
__________ is also called nearsightedness and shortsightedness.
Answer
Mirror
Normal
Equal
Cornea
Myopia
Question 2 STATE THE FOLLOWING AS TRUE OR FALSE:
Trees are the example of luminous objects.
The angle between the reflected ray and the normal at the point of incidence is called angle of incidence.
In mirror, the size of the image is the same as the size of the object.
Real images are formed on the screen.
The set of seven colours into which white light can be separated is called spectrum.
Answer
False
False
True
True
True
Question 3 UNSCRAMBLE THE FOLLOWING WORDS:
Answer
MIRROR
VIRTUAL
REFLECTION
PERISCOPE
MYOPIA
Question 4 CHOOSE THE CORRECT OPTION:
(a)The sun is the example of ________.
i.Reflection
ii.Luminous objects
iii.Non luminous object
iv.Mirror
(b)Which disorder caused by the small size of eyeball than normal?
i.Myopia
ii.Hypermetropia
iii.Cataract
iv.Shortsightedness
(c)Vitamin A is good for________.
i.Eye
ii.liver
iii.Heart
iv.All of these
(d)How many types of non-optical aids?
i.Three
ii.Two
iii.Four
iv.None of these
(e)What is the name of white part of the eye?
i.Pupil
ii.Iris
iii.Sclera
iv.Cornea
Answer
(a)II.
(b)II.
(c)I.
(d)III.
(e)III.
Question 5 Name of the following:
These are the types of images.
The angle of incidence is equal to the angle of reflection.
Which type of image will form by pinhole of camera?
It is the bouncing back of light rays after hitting any surface.
The phenomenon of bending of light from one medium to another.
The reflection of light from a surface such that an incident ray is reflected at many angles, rather than at just on angle.
$n=360 \div \theta -1$ is an equation of this.
The muscular diaphragm of the eye.
Myopia is corrected by using these lens.
The doctors who perform medical and surgical treatments for eye disorders.
Answer
Virtual and real
Law of reflection
Real image
Reflection of light
Refraction
Irregular or diffused reflection
Multiple reflection
Iris
Concave lens
Ophthalmologist
Question 6 Very short answer type questions:
(i)Give any four example of vitamin A.
(ii)What is pupil?
(iii)How many types of defects of vision?
(iv)What should we do to take care of our eyes?
(v)Name any two non- optical aids?
Answer
(i)Egg, carrot, broccoli and milk.
(ii)The pupil of the eye is the black circle in the centre of the iris.
(iii)There are three types of defect of vision.
(iv)We should maintain a distance while reading a book.
(v)Visual aids and auditory aids.
Summary
This Light class 8 worksheets with answers is prepared keeping in mind the latest syllabus of CBSE.This has been designed in a way to improve the academic performance of the students. If you find mistakes , please do provide the feedback on the mail.
