Here you will find Ch 11 Science Class 10 NCERT Solutions contains all the main and important topics which have complete and detailed descriptions Ch 11 Science Class 10 NCERT Solutions will help the students of class 10 to secure good scores in upcoming exams.
Ch 11 Science Class 10NCERT Solutions
Ch 11
Science Class 10 NCERT Solutions covers the complete syllabus and let you secure the best results in CBSE and
RBSE and other board exams.
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| Ch 11 Science Class 10NCERT Solutions |
NCERT Solutions for Class Science Chapter 11
Before you go through
NCERT Solutions for Class Science Chapter 11, just
see the topics covered in class 10 science chapter 11 NCERT solutions-
1. The Human Eye
2 . Working of the
human eye
3. Clear vision
4. Accommodation power
5. Near point
6. Far point
7. Defects of Vision
and Their Correction- Myopia, Hypermetropia, Presbyopia, Astigmatism,
Colour-blindness, Cataract
8. Refraction of Light
Through A Prism
9. Dispersion of White
Light By A Glass Prism
10. Cause of dispersion
11. Compounds of white
light
12. Spectrum
13. Atmospheric
Refraction
14. Rainbow formation –
Twinkling of stars
15. Advanced sunrise
and delayed sunset
16. Scattering of Light
17. Blue colour of the sky
18. Why do astronauts in
space observe the colour of sky black at high altitudes?
19. White colour of
clouds
20. Tyndall Effect
21. Colour danger
signals
22. Red colour of the
sun at sunrise and sunset
This class 10 science chapter 11 ncert solutions are very useful
for students
of the CBSE board, RBSE and other state boards of Rajasthan, Uttar Pradesh, M.P., Gujrat
and all other states boards.
NCERT solutions class 10 science chapter 11
are based on the latest syllabus of CBSE 2021-22.
Chapter 11 The Human Eye and the Colourful World
Important points of Class 10 Science Chapter 11 NCERt Solutions
1. The
ability of the eye to focus both near and far objects, by adjusting its focal
length is called the accommodation of
the eye.
2.
The smallest distance at which the eye can see objects clearly without strain,
is called the near point of the eye or the least distance of the distinct vision.
For an adult with normal vision, it is about 25 cm.
3.
The common refractive defects of vision include myopia, hypermetropia and
presbyopia. Myopia (short-sightedness- the image of distant objects is focused
before the retina) is corrected by using a concave lens of suitable power.
Hypermetropia (farsightedness- the image of nearby objects is focused beyond the retina) is corrected by using a concave lens of suitable power. The eye loses
its power of accommodation at old age.
4.
The splitting of white light into its component colour is called dispersion.
5. Scattering of light
causes the blue colour of the sky and the reddening of the sun at sunrise and
sunset.
6. The human eye
consists of the cornea, lens, iris, ciliary muscles, retina, optic nerves.
7. Outer bulging part
of the eye is called the cornea which allows light to enter the eye.
8. Iris controls the
amount of light entering the eye by adjusting the size of the pupil.
9. The focal length of
the eye lens is adjusted by the ciliary muscles.
10. Retina acts as a screen on which an image is formed.
11. Accommodation
is the ability of the eye lens to adjust the focal length to form a sharp image of
the object at different positions on the retina.
12. near point is the
nearest position of an object from the eye so that its sharp image is formed on the retina, it is 25 cm for a normal human eye with good vision.
13. Range of vision is
the distance between near point to far point. It is 25 cm to infinity for the normal human eye.
14. Cause of
Presbyopia is a decrease in the flexibility of the eye lens.
15Astigmtaism is the
type of defect in which a person cannot see horizontal and vertical lines
simultaneously. It can be corrected by using a cylindrical lens.
16. Myopia occurs
due to the following reasons-
(i) elongation of the eyeball
(ii) by increasing the
power of the eye lens
19. Hypermetropia
occurs due to the following reasons –
(i)decrease in size of the eyeball
(ii) by increasing the focal length of the eye lens
20. Cataract is the
defect of the human eye in which a membrane is formed over the eye lens, it can be corrected
by surgery.
21. Prism is the
transparent medium bounded by two surfaces inclined at some angle.
22. Dispersion of light
is the phenomenon of splitting white light into its components colours when
passes through a prism.
23. Violet colour
deviates most and red colour deviates least.
24. Angle of the prism is
the angle between two surfaces of the prism.
25. Spectrum is the
band of seven colours formed by passing white light through a prism.
23. Rainbow is formed
by the dispersion of white light through tiny droplets of water present in the
atmosphere after rain.
24. Stars seems to be
twinkle due to atmospheric refraction as the speed of light ray speed up or slow
down many times on passing through atmospheric layers.
25. The sun is visible
to us 2 min before of actual sunrise and after 2 minutes of actual sunset due
to atmospheric refraction.
26. Red colour of the
sun at the time of sunrise and sunset is due to the scattering of light.
27. Scattering of light
is bouncing back of light in a different direction when it falls on tiny particles.
28. The angle of deviation is
the angle formed between the direction of the incident ray and an emergent
ray of light known as the angle of deviation.
Related Searches
Frequently Asked Questions
1. What is CBSE 10th spectrum?
In CBSE class 10 science spectrum means when white light passes through a prism, it dispersed
into seven colours named in short -VIBGYOR. The band obtained is called a spectrum.
2. What is the most important chapter in class 10
science?
In class 10 science each chapter has been given
particular weightage or marks. So, study all the chapters but some of them are chapter
chemical reaction and equations, light, electricity etc.
3. What is meant by the power of accommodation of the eye name
the muscle of the eye responsible?
The human eye adjusts its focal length between near point
and the far point itself, this is known as the power of accommodation.
Ciliary muscles are responsible for the power of accommodation.
4. Is science class 10 hard?
Science is one of the most important subjects in class
10. most of the students find it difficult but if you study regularly, prepare notes,
then don’t worry.
5. What are the most important topics in physics class
10?
All the topics in physics class 10 are important in
the context of the board exams. But some of them are – a reflection of light,
refraction of light, image formation by a concave and convex mirror, Ohm’ law, resistance and factors affecting resistance, series and parallel combination of resistors, magnetic effect of electric
current and so on.
If you find any difficulty, please do comment.
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