🎯 Knowledge Check

Physics — The Human Eye And The Colourful World

50 Questions Class 10 MCQs
1
The part of the eye that controls the amount of light entering the eye is the ____.
2
The image formed on the retina is ____.
3
The least distance of distinct vision for a normal human eye is about ____.
4
The ability of the eye lens to adjust its focal length is called ____.
5
Which part of the eye is responsible for converting light into electrical signals?
6
The range of vision for a normal human eye is ____.
7
The defect in which a person cannot see distant objects clearly is called ____.
8
Myopia is corrected using ____.
9
Hypermetropia can be corrected using a ____.
10
The near point of a normal human eye is ____.
11
The far point of a myopic person is ____.
12
The ciliary muscles help in ____.
13
Which of the following phenomena is responsible for the twinkling of stars?
14
The sky appears blue due to ____.
15
The phenomenon of splitting of white light into its component colors is called ____.
16
The color of the sky appears reddish at sunrise and sunset due to ____.
17
Which color is deviated the most in a prism?
18
The splitting of white light by a prism shows that light is made up of ____.
19
The defect of vision where both near and distant objects appear blurred is ____.
20
Presbyopia is corrected using ____.
21
The human eye lens is a ____.
22
The retina contains ____.
23
The sensation of vision persists for about ____.
24
The atmospheric refraction of sunlight causes ____.
25
The phenomenon responsible for rainbow formation is ____.
26
In a rainbow, the topmost color is ____.
27
The bottommost color of a rainbow is ____.
28
The refractive index of the eye lens is approximately ____.
29
The shape of the eyeball in myopia is ____.
30
The shape of the eyeball in hypermetropia is ____.
31
Which color of light has the longest wavelength?
32
The scattering of light is inversely proportional to ____.
33
The Tyndall effect is due to ____.
34
The phenomenon responsible for the blue color of the sky and reddish color of the sun is ____.
35
The cause of color in the rainbow is ____.
36
Which phenomenon explains why danger signals are red?
37
When white light passes through a prism, which color bends the least?
38
Which cells in the retina are sensitive to dim light?
39
Which cells in the retina are responsible for color vision?
40
What is the nature of the image formed on the retina?
41
Why can’t we see clearly underwater?
42
The eye lens focuses light on ____.
43
The power of accommodation decreases with ____.
44
The prism deviates light due to ____.
45
Why does the sky appear dark to astronauts?
46
Which phenomenon is observed in the case of an oil film on water?
47
A person having both myopia and hypermetropia uses ____.
48
What causes the apparent bending of a stick partly immersed in water?
49
The eye lens becomes thin when looking at ____.
50
The splitting of sunlight into seven colors by water droplets in the atmosphere forms ____.

Frequently Asked Questions

The human eye enables us to see objects by detecting and focusing light on the retina.

It is the minimum distance at which a normal eye can see objects clearly, about 25 cm.

The pupil is the eye opening that controls the amount of light entering the eye.

The iris is the colored part of the eye that regulates the size of the pupil.

It is the eye's ability to focus on distant and near objects by adjusting lens shape.

Stars twinkle due to atmospheric refraction of their light by Earth's unsteady atmosphere.

Myopia is near-sightedness, hypermetropia is far-sightedness—both are vision defects.

Myopia is corrected using concave lenses.

Hypermetropia is corrected using convex lenses.

Presbyopia is age-related loss of eye's ability to focus on nearby objects.

It is the bending of light as it passes through different layers of Earth's atmosphere.

Both occur due to atmospheric refraction bending sunlight.

Dispersion is the splitting of white light into its component colors by a prism.

A rainbow forms from sunlight dispersion, refraction, and internal reflection by raindrops.

It is the time for which an image stays on the retina after exposure ends (about 1/16th second).

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