GENERAL INSTRUCTIONS (Please read the following instructions very carefully)
1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
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4. Do not click the button Submit Test before completing the paper on Answer Sheet.
5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
A person cannot see objects clearly which are nearer than 75cms from his eyes, the disease he is suffering from is _________________.
Astigmatism
Myopia
Hypermetropia
Presbyopia
2
How many colors is white light made up of ?
A single colour
Primary colours
Five colours
Seven colours
3
In dim light, the iris ____________ the pupil to admit more light into the eye.
Contracts
Widens
No change
All of these.
4
The farthest point up to which the eye can see properly is called the __________________.
Near point of the eye
Far point of the eye
Infinite point of the eye
None of these
5
The scattering of longer wavelengths of light increases as the size of the particles __________________.
Decreases
Increases
Both (a) and (b) are correct.
6
The phenomenon of scattering of light by colloidal particles is known as ________.
Raman effect
Newton's ring
Spectral effect
Tyndall effect
7
The defect which is caused by oblong shape of the eye ball is ______________________.
Cataract.
8
The sky looks blue on a clear,sunny day because of ___________________.
Dispersion of light
Scattering of light
Reflection oflight
Refraction of light
9
Which is the complimentary colour of blue in the rainbow?
Red
Orange
Green
Magenta
10
Night blindness occurs due to deficiency of which vitamin?
A
B
C
D
11
Clouds look white because of ______________ by large drops of water in it.
Scattering
Differection
Dispersion
12
Which of the following are correct :
(a) Far-sightedness is also known as long- sightedness, hypermetropia or hyperopia.
(b) In farsightedness, people cannot see nearby objects clearly, although they can see distant objects clearly.
Only (a) is correct.
Only (b) is correct.
None of these.
13
Internal reflections of light is prevented in human eye by ____________________.
Iris
Pupil
Choroid
Blind spot
14
__________is the phenomenon due to which sky appears dark instead of blue to an astronaut
Reflection
Glazing
Twinkling
15
When an object is placed at the near point, the curvature and thickness of the crystalline lens are ___________and the focal length of the eye-lens is ______________.
minimum, maximum
maximum, maximum
maximum, minimum
minimum, minimum
16
Which of the following are correct ?
(a) Rainbow appears as a seven-coloured arc in the sky when there are raindrops in the air it is visible when the sun is low in the sky .
(b) The rainbow get its colours come from the dispersion of white light by raindrops suspended in the air .
(c) Rainbow has red at the top and violet at the bottom .
Only (a) and (b) is correct .
Only (b) and (c) is correct .
Only (a) and (c) is correct .
All of these
17
In a certain eye defect, image is formed in front of retina. The focal length of the lens used to correct the defect is ______________
Positive
Negative
O
18
The persistence of an eye vision is for _____________.
19
The suspended particles of milk scatter more of the ____________ lights.
Radish
Greenish
Bluish
All of the above
20
The combination responsible for admitting different amounts of light into the eye is _______________.
Ciliary muscles and crystalline lens
Ciliary muscles and pupil
Iris and pupil
Rods and cones