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