What is science
A type of specialized knowledge is called science
Or
Science is the study of nature and behaviour of natural things and the knowledge that we obtain about them
Or
The study of and knowledge about the physical world and natural law is called science
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Science
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Physics. Chemistry. Biology
1 PHYSICS:~
The branch of science under which physical phenomena study natural phenomena is called physics
2 CHEMISTRY
The branch of science under which study chemical reaction, chemical compounds, structure of elements is called chemistry
3 BIOLOGY:~
The branch of science under which study of plants and animals living things etc is called biology
High school physics study topic
Ch. 1
Light Reflection and refraction
Ch.2
Human eye and colourful world
Ch.3
Electronic
Ch.4
Magnetic fields
Chapter n.1
Light Reflection and Refraction
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Light :-
Light is a form of energy which gives us the power of vision
Properties of light
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1. Light has a dual nature ie wave as well as particle
2. Lights cast shadow
3. Speed of light in vaccum 3 ×10⁸ m/s
4. Light tends to travel in straight line
Reflections of light :-
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Incident ray \ | /
\ | /. Reflected ray
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' ' ' ' ' ' ' ' N ' ' ' '. ' ' mirror
Bouncing back of light when it strike on a polished surface like as mirror
Or
When the light ray falls on polished surface most of the light gets reflected
Laws of Reflection
1.
The angle of incidence is always equal to
Angle of Reflection
≤ i = < r
2.
The incident ray the reflected ray and the normal at the point of incidence all lie in the same plane
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