Class 8 Human Eye Test series.

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Class 8 MCQ Test Series

This Question Series is related to Adityaverse.

If you complete this question series within 30 minutes then I will sure that you know all the basics about Human Eye chapter.

Let The Journey begins.

Question 1.
The following controls the light entering the human eye.
(a) Iris
(b) Pupil
(c) Retina
(d) Cornea

Answer

Answer: (a) Iris

Question 2.
At noon the sun appears white as
(a) light is least scattered.
(b) all the colours of the white light are scattered away.
(c) blue colour is scattreed the most.
(d) red colour is scattred the most.

Answer

Answer: (a) light is least scattered.

Question 3.
Function of the optic nerve is
(a) Transfer the signals to brain.
(b) Image formation.
(c) Sensation of vision.
(d) Controls the light entering the human eye.

Answer

Answer: (a) Transfer the signals to brain

Question 4.
Rod cells of retina corresponds to.
(a) Light sensitivity.
(b) Colour sensitivity.
(c) Size sensitivity.
(d) All of these.

Answer

Answer: (a) Light sensitivity

Question 5.
Name the spot where no image os formed on the retina
(a) Green spot.
(b) Black spot.
(c) Blind spot.
(d) optic nerve.

Answer

Answer: (c) Blind spot.

Question 6.
Which of the following phenomena of light are involved in the formation of a rainbow.
(a) Reflaction,refraction and dispersion.
(b) Refraction,dispersion and total internal reflection.
(c) Refraction,dispersion and internal reflection.
(d) Dispersion,scattering and total internal reflection.

Answer

Answer: (c) Refration,dispersion and internal reflection

Question 7.
What is the function of the pupil.
(a) sends messages picked up by the retina to the brain
(b) the hole that controls the different amounts of light
(c) the coloured part of the eye that controls the size of the pupil
(d) transparent jelly like fluid that fills the eye

Answer

Answer: (a) the hole that controls the different amounts of light

Question 8.
Twinkling of stars is due to atmospheric
(a) dispersionof light by water droplets
(b) refraction od light by different layers of varying refractive indices
(c) scattering of light by dust particles
(d) internal refractionof light by clouds

Answer

Answer: (b) refraction of light by different layers of varying refractive indices

Question 9.
What is the outer tough layer of the eye?
(a) lens
(b) iris
(c) pupil
(d) sclera

Answer

Answer: (d) sclera

Question 10.
Which of the following statement is correct regarding the propagation of light of different colours of white light in air
(a) Red light moves faster
(b) Blue light moves faster than green light
(c) All the colours of the white light moves with the same speed
(d) Yello light moves with the mean speed as that of the red and the violet light

Answer

Answer: (c) All the colours of the white light move with the same speed

Question 11.
The impression or sensation remains on the retina for about how many seconds even after removal of the object?
(a) 1 second
(b) 1/16th of the second
(c) 16 seconds
(d) 1 minute

Answer

Answer: (b) 1/16th of a second

Question 12.
Beam of light striking the reflecting surface is called
(a) reflecting ray
(b) incident ray
(c) refracted ray
(d) normal ray

Answer

Answer: (b) incident ray

Question 13.
Band of seven colours is called
(a) VIBGYOR
(b) spectrum
(c) dispersion
(d) reflection

Answer

Answer: (b) spectrum

Question 14.
The cells present in the retina of eye and responding to coloue are:
(a) Rod-shaped cells
(b) Cones
(c) Both of these
(d) None of these

Answer

Answer: (b) Cones

Question 15.
Front balged part of the eyeball is called
(a) cornea
(b) choroid
(c) pupil
(d) retina

Answer

Answer: (a) cornea

Question 16.
The disease of eye in which crystalline lens becomes hazy or even opaque due to development of membrane over it is
(a) Myopia
(b) Cataract
(c) Hypermetropia
(d) Presbyopia

Answer

Answer: (b) Cataract

Question 17.
The splitting of white light into its component colours is called
(a) refraction
(b) reflation
(c) dispersion
(d) tyndal effect

Answer

Answer: (c) dispersion

Question 18.
Reason behind advance sunrise and delayed sunset
(a) atmospheric refraction
(b) total internal reflaction
(c) dispersion
(d) reflection

Answer

Answer: (a) atmospheric refraction

Question 19.
Type of lens used in correction of myopia
(a) convex lens
(b) concave lens
(c) reflecting lens
(d) bifocal lens

Answer

Answer: (b) concave lens

Question 20.
Type of lens used to correct Hypermetropia
(a) concave lens
(b) reflecting lens
(c) bifocal lens
(d) convex lens

Answer

Answer: (d) convex lens

Location: India

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