CBSE Papers, Questions, Answers, MCQ ...Blog provides NCERT solutions, CBSE, NTSE, Olympiad study material, model test papers, important Questions and Answers asked in CBSE examinations. References to Educational Sites and resources. Home Resources Class 11 Class X Class IX Class 8 Class 7 Class 6 NTSE CTETTUESDAY, OCTOBER 4, 2011class 10 - Notes on Light and ReflectionNotes on Light and Reflection1. Light is a form of energy. Since energy cannot be seen, we see objects in light.

2. A ray of light is a straight line which represents the path of traveling light. A collection of light rays is called a beam of light.

3. Q:How do we see objects? Ans: The visual ability of humans is the result of the complex interaction of light, eyes and brain. We are able to see because light from an object can move through space and reach our eyes. Once light reaches our eyes, signals are sent to our brain, and our brain deciphers the information in order to detect the appearance, location and movement of the objects we are sighting at.

4.Luminous objectsare objects that generate their own light. e.g. firefly, the sun.

5.Illuminated objectsare objects that are capable of reflecting light to our eyes. e.g. the moon

6. A ray of light that falls on a surface is calledincident ray.

7. The light that is sent back by the reflecting surface is called reflection.

8. The ray that is sent back by the reflecting surface is called thereflected ray.

9. When light falls on a body, it may be absorbed, may be transmitted or light may come back to the same medium.

10.Laws of Reflection(watch the you tube video):

a.First lawof reflection: The incident ray, the normal to the surface at the point of incidence and the reflected ray, all lie in the same plane.

b.Second lawof reflection: The angle of incidence is equal to the angle of reflection.

11. Real image is obtained when the rays of light after reflection, actually converge at a point.It can be obtained on the screen and can be seen with the eye.

12. Virtual image forms when rays of light do not actually meet, but appear to meet when produced backwards.It cannot be obtained on the screen.

13.Q: Name the characteristics of image formed on plane mirror.Ans: i) image is virtual and erect. ii) size of image is same as the size of the object and laterally inverted. iii) distance between image and mirror = distance between object and mirror.

14.Concave mirror: A curved surface whose inner side is capable of reflection.

15.Convex mirror: A curved surface whose outer side is capable of reflection.

16. The radius of curvature of a spherical mirror is twice of its focal length.

17. Mirror Equation is:

18.Magnification: The ratio of the size of the image to the size of the object.

19. Snell's law:n = sin i/ sin r, is a constant. This is the refractive index of the medium.

20. Presentation on Optics:Unit 33 OpticsView morepresentationsfromOlympus High School - Jeff TaylorPosted bySahnanat12:08 AMEmail ThisBlogThis!Share to TwitterShare to FacebookLabels:class10-physics,class10-scienceReactions:

2 comments:1. Nilesh PareekOctober 28, 2012 at 6:04 AMits a very good site you can learn many things from it..Reply2. anshu bishtNovember 24, 2013 at 3:56 AMi have to make a presentation on a shady plot chapter... how can i make it....??ReplyNewer PostOlder PostHomeSubscribe to:Post Comments (Atom)POPULAR ONES CBSE Class 9 - PSA Sample Paper by CBSEClass 9 -PSA Paper See the Sample Answer Sheet Diversity In Living Organisms - CBSE - Class 9 - Science (CH7)DIVERSITY IN LIVING ORGANISMS (NCERT Solutions, Q & A ...) Q1( CBSE 2011 ): What do you mean by bio diversity? Answer : Bio-... CBSE Class 9 - Science - CH 13 - Why do We fall iLLWHY DO WE FALL ILL? 3D image of FluVirus (credits: PHIL ) (NCERT Chapter Solutions, Q &A) Q1: Define Health? What do you interp... English Grammar - Editing Exercise-1Editing Exercise Exercise 1: England has been long famous for her dramatist, a) the greatest of who was William Shakespeare. b)... CBSE Class 9 - Science - CH 3 - Atoms and MoleculesAtoms and Molecules Molecular Structure NCERT Solution, MCQs, Study Notes, Q & A Q1: Who established the two important laws o... CBSE Class 10 - SA2 Science Solved Sample Paper (2012-2013)Class 10 -Science Sample Paper (SA2) From this session (2012-2013), CBSE has stopped publishing Sample Question Papers (SQP). Ho... CBSE Class 10 - English (C) - A Shady PlotA Shady Plot A Shady Plot: By Elsie Brown image credits: openclipart Q & A Q1: Why did Helen and other ghosts like her organ...VISITS COUNTER7868313LABELSntse(103)CTET(75)class9-science(72)class9-english(69)class10-english(65)class10-science(64)science-quiz(44)class8-science(42)class9-sstudies(37)class8-english(36)class10-sstudies(33)class9-maths(32)class7-science(29)class10-hindi(25)class9-hindi(25)class6-science(24)class7-english(19)class10-biology(18)class8-hindi(16)NSO-Class9(15)NSO-class10(15)class10-chemistry(15)class10-maths(15)class10-physics(15)class9-PSA(15)class8-maths(14)class6-english(13)class7-French(13)class8-French(13)class8-sstudies(13)class9-French(13)NSO-Class8(12)english-quiz(12)cbse(11)class7-maths(11)class7-sstudies(11)NSO-Class7(9)class11-physics(9)class7-hindi(9)General Knowledge(8)class11-compScience(8)class10-mcq(7)class10-science-paper(7)class6-French(7)class6-sstudies(7)class10-FIT(6)class11-english(6)imo-class8(6)imo-class9(6)Olympiad-maths(5)class10-French(5)class11-chemistry(5)class9-sanskrit(5)software(5)JSTSE(3)class10-physics-numericals(3)class11-PSA(3)class12-english(3)class12-science(3)class9-fit(3)news(3)science-quest(3)class 6-hindi(2)class10-sanskrit(2)class6-hindi(2)class6-maths(2)english-comprehension(2)hindi-quiz(2)imo-class10(2)class6-sanskrit(1)class7-sanskrit(1)class8-sanskrit(1)FOLLOWERSFOLLOW ME ON TWITTERFEEDS

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