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GRADE 10
SCIENCEP H Y S I C S
by Glebert Dadol for BTG: Kto12 Summer 2016
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OUTLINE
1. ELECTROMAGNETIC SPECTRUM
– SOME PROPERTIES OF LIGHT/EM
RADIATION
– TYPES OF EM RADIATION (THE
SPECTRUM
2. LIGHT, MIRRORS, AND LENSES
– WAVE PROPERTIES OF LIGHT
– TYPES OF MIRRORS AND LENSES
– RAY DIAGRAMING/IMAGE
FORMATION
3. ELECTRICITY AND MA
– MOTOR
– GENERATOR
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WHAT MAKES US SEE?LIGHT
• Light is a form of energy that is released by
our lamps, bulbs, phone screens,TV monitors,
• Light is a type of electromagnetic radiation.
• Electromagnetic radiation is the energy releas
matter in the form of electromagnetic waves.• Electromagnetic waves are waves formed
the mutual induction of electric fields and m
fields.
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E L E C T R O M A G N
S P E C T R U MV I S I B L E A N D I N V I S I B L E L I G H T
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ELECTROMAGNETIC RADIATION:SOME PROPERTIES
• A HUGE SPECTRUM
• WAVE NATURE
• PARTICLE NATURE
• CAN TRAVEL IN VACUUM
• WITH A MAXIMUM SPEED OF 3X108 m/s
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WAVE NATURE AND PARTICLE NA
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ELECTROMAGNETIC SPECTRUM
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HOW DO WE SEE?LIGHT FROM AN OBJECT ENTERS OUR EYES
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LIGHT,M I R R O R S ,
A N D L E N S E SO B J E C T S I N S O M E M I R R O R S S E E M
C L O S E R T H A N T H E Y A P P E A R
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WAVE PROPERTIES OF LIGHT
• Reflection
• Refraction
• Dispersion
• Diffraction
• Interference
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REFLECTION VS REFRACTION
•
Reflection –
bouncing of light •
Refraction –
bending o
Law of Reflection Snell’s Law
1
1
2
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MIRRORS AND LENSES
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IMAGE FORMATION: POSITIVEMIRRORS
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IMAGE FORMATION: NEGATIVEMIRRORS
p q
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PROPERTIES OF IMAGE FORMED MIRRORS
Plain
Concave
Beyond Center of
Curvature
Within Center of
Curvature and
Beyond Focal
Point
Within Focal
Point
Virtual Real Real Virtual
Upright Inverted Inverted Upright
Same Size Smaller Larger Larger
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IMAGE FORMATION: POSITIVE LE
p q
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IMAGE FORMATION: NEGATIVE LE
p
q
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SEEING IMAGES
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MICROSCOPES AND TELESCOPES
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HOW DO POWER PLANTS WORBY CONVERTING ONE FORM OF ENERGY TO ANOTHER
WATER STEAMHEAT
COAL TURBINE
ELECTRICAL
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E L E C T R I C I T Y A N D
M A G N E T I S M M R . A N D M R S . E L E C T R I C A N D M A G N E T I
F I E L D
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ELECTRICITY
•
Electricity is the presence and motion of charged particles.• Static electricity is the build up of electric charges on an object.
• Electric current is the flow of charged particles around an clos
electric circuit.
• Current electricity - the continuous flow of electric charge.
• Direct current (DC) – current in which the electric charges
direction.
• Alternating current (AC) – current in which the electric cha
one direction, then in the reverse direction, over and over again.
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HOW DOES ELECTRICITY GENERAMAGNETISM?
•By electromagnetic induction
presence of an electric field gene
magnetic field
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MAKING AN ELECTROMAGNET
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HOW DOES MAGNETISM GENERAELECTRICITY?
• By electromagnetic induction – a changi
magnetic field creates an electric field and if
a close circuit, current electricity is generate
• The change can be achieved by chang
direction of the magnetic field i.e. mov
magnet or moving the coil.
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INDUCING CURRENT IN A COIL
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ELECTRIC GENERATOR
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WHAT IS A MOTOR THEN?
• Generator – mechanicalenergy (moving of the
magnet or the coil) to
electrical energy.
• Motor - the opposite of a
generator; convertselectrical energy to
mechanical energy.
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T H A N K Y O U !
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G A M E S !
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C A L L M Y n E . MG A M E 1
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C O N C A V E M AC O N V E X
VA P O R U BG A M E 2
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M A C H I N A G A M E 3
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GOOD LUCK FO
THE EX AM!S T U DY H A R D , B U T N O T T O O H A R D
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