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FIND OUT TYPE AND EXAMPLE OF WAVE
DAMPING
D
E
DECREASE IN AMPLITUDE OF AN OSCILLATING SYSTEM
DAMPING
RESONANCE
D
E
NEXTSLIDE
A SYSTEM OSCILLATE AT A FREQUENCY EQUIVALENT TO ITS NATURAL FREQUENCY BY EXTERNAL FORCE
RESONANCE
O PENDULUM A
S/P SAME LENGTH AS B
E NATURAL FREQUENCY A =
NATURAL FREQUENCY B
R OSCILLATE SAME AMPLITUDE AS B
RESONANCE
O SWING
E
S/P IS PUSH WITH CERTAINFREQUENCY
FREQUENCY OF EXTERNAL PUSH =
NATURAL FREQUENCY OF SWING
R SWING IS OSCILLATE
TUNNING RADIO FREQUENCY
QUIZ FUNCTION OF RIPPLE TANK
REFLECTION
D
E
WAVE UNDERGOES CHANGE IN DIRECTION
O ELECTRIC MOTOR
S/P IS SWITCH ON
E STRAIGHT WAVE IS SEND TO STRAIGHT BARRIER
R WAVES ARE REFLECTED(i = r)
O LIGHT RAY
S/P DIRECT ON TO A MIRROR
E INCIDENT RAYREFLECTED
RANGLE OF
INCIDENT RAY (i) =
ANGLE OFREFLECTED RAY (r)
O SOUND
S/PIS PLACED AT ONE END OF TUBE
E
R
CLEAR SOUNDIS HEARD AT THE OTHER SIDE ANGLE OF
INCIDENT RAY (i) =
ANGLE OFREFLECTED RAY (r)
O
S/P
WATER WAVE
SEND STRAIGHT ACROSS D TANK
E WATER TRAVEL SLOWER IN SHALLOW WATER THAN DEEP WATER
R λ SHALLOW WATER <
λ DEEP WATER
FREQUENCY OF
WATER
UNCHANGED
DURING
REFRACTION
DEEP SHALLOW
O WATER WAVE
S/P ENTER A GLASS WITHAN ANGLE
E1 WATER WAVE TRAVEL FROM DEEP TO SHALLOW
R1 WAVE BEND TOWARD NORMAL
E2 WATER WAVE TRAVEL FROM SHALLOW TO DEEP
R2 WAVE BEND AWAY NORMAL
E
WATER WAVEO
P SEND THROUGHCONVEX SHAPE GLASS
WATER WAVE TRAVEL FROM DEEP TO SHALLOW
R CONVERGE TO D FOCUS POINT
E
WATER WAVEO
P SEND THROUGHCONVEX SHAPE GLASS
WATER WAVE TRAVEL FROM DEEP TO SHALLOW
R DIVERGE AFTER PASSING SHALLOW REGION/AS IF COME FROM F POINT
REFRACTION OF SHORE
E
WATER WAVEO
S DEPTH OCEAN UNIFORM
WATERFRONT GO STRAIGHT
MIDDLE OF OCEAN
E
WATER WAVEO
S TAKE D SHAPE OF BEACH
WATER TRAVEL FROM DEEPTO SHALLOW
AT D SHORE
R REFRACTION OCCUR
DIFFRACTION
D
E
WAVES SPREAD OUT AFTER PASS THROUGH AN APERTUREOR SMALL OBSTACLE
O WATER WAVE
P PASS THROUGH SMALL OBSTACLE
E
R
WAVE SPREAD BEHIND OBSTACLE
APPEAR N JOIN BACK
O
E
P
CASSETTE PLAYER
IS SWITCHED ON
STUDENT CAN HEAR MUSIC ALTHOUGH PLAYER OUT OF SIGHTFROM D STUDENT
R SOUND WAVE IS DIFFRACTEDAFTER PASSING D CORNER
SUPERPOSITON
D
E
CONSTRUCTIVEINTERFERENCE
DESTRUCTIVEINTERFERENCE
Video: Types Of Electromagnetic Wave
DOCCUR WHEN SOUND WAVES OVERLAP
LOUD SOUNDConstructiveInterference
In phase
SOFT SOUNDDestructive interference out of phase
DEPENDS ON FREQUENCY
HIGHER FREQUENCY@ VIBRATION
HIGH-PITCHED
HIGHER FREQUENCY@ VIBRATION
LOW-PITCHED
HIGH-PITCHED
LOW-PITCHED
State who has d high pitched – low pitched voice
Describe the difference of their voice’s amplitude
SOUND REFLECTED-CAN BE HEARD AS ADISTINCT SOUND-FROM ORIGINAL SOUND
D
B ESTIMATE D DISTANCE
O
P
E
R
HIGH FREQUENCY
TRANSMITTED FROMD SHIP
ECHO RETURN
TIME TAKEN FOR ECHO IS USEDTO FIND D DEPTH
O
P
HIGH FREQUENCY
EMIT WHEN D SOUND COLLIDEWITH OBSTACLES
E RECEIVE D ECHO
R 1)AVOID COLLIDE2)LOCATE&CATCH INSECT
ALTHOUGHIN D DARK