Search 2013 SPM Tips:

Recent Discussion

Thursday, February 16, 2012

Facts about Waves


Things u should know about waves..
  1. Waves transfer energy without transfering the matter.
  2. In transverse waves, its particles vibrate perpendicular to the wave direction.
  3. Longitudinal wave's particles vibrate parallel to the wave direction.
  4. The amplitude of a wave determines its energy. Higher amplitude has greater energy.
  5. Damping of wave causes decrease in amplitude & energy.
  6. Waves' wavefront is always pependicular to the direction of the waves.
  7. Waves undergo all of these phenomena; reflection, refraction, diffraction & interference.
  8. Water,light & electromagnetic waves are transverse waves.
  9. Coherent waves have same frequency ,amplitude and in phase.
  10. As the frequency of a wave increases its energy increases and its wavelength decreases.
  11. Shorter waves with higher frequencies have shorter periods.

Facts about Light Wave
  1. Light is a transverse wave
  2. Light slows down, bends toward the normal and has a shorter wavelength when it enters a higher refractive index(n) or as it moves to denser medium..
  3. Medium with higher refractive index has higher optical density.
  4. At the critical angle a light wave will be refracted to 90 degrees.
  5. Blue light has more energy,a shorter wavelength and a higher frequency than red light (remember- ROYGBIV).
  6. Monochromatic light has one color, frequency & wavelength.
Facts about water waves
  1. Water waves moves faster at deeper region. This change in speed causes refraction of water waves.
  2. Water waves has longer wavelength at deeper region.
  3. Deeper region is less dense than shallow region.
  4. Water waves bended towards normal as it moves from deeper to shallow region.
  5. After diffraction, water waves amplitude decrease thus its energy decrease as well.However its speed, wavelength & frequency remain constant.
Facts about sound waves
  1. Sound is a longitudinal waves.
  2. Sound is produced through vibration, thus compressing & stretching the surrounding air molecules.
  3. Louder sound has bigger amplitude.
  4. Sound with high pitch has higher frequency.
  5. The sound that we hear is known as 'audio sound' that has freuency between 20-20khz.
  6. Those sound below 20hz is known as infrasound. While sound with frequency beyond 20khz is known as ultrasonic.
  7. Sound require medium to travel. It travels fastest in solid> liquid> gas.
  8. Sound can't be heard in vacuum..Therefore..Starwars' sound effect in outer space is a myth :)

2 comments:

yusri said...

nak tanya maksud koheren yang sebenarnya

Cikgu fizik said...

waves with same frequncy, same wavelenght and they are in phase.

2011 Physics Trial Paper

Terengganu P1 P2 P3 (no answer scheme)



LinkWithin

Related Posts with Thumbnails

2010 Physics Trial Paper

SBP 2010 [ P1 ] [ P2 ] [ P3 ] [ ANS. SCHEME ]

SABAH 2010 [ P1 ] [ P2 ] [ P3 ]

JOHOR 2010 [ P1,P2,P3 ]

TERENGGANU 2010 [ P1 ] [ P2 ] [ P3 ] [ ANS. SCHEM]

MELAKA 2010 [ P1,P2,P3 ]

PERLIS 2010 [ P1 ] [ P2 ] [ P3 ] [ ANS. SCHEM]

S'NGOR 2010 [ P1 ] [ P2 ] [ P3 ] [ ANS. SCHEM]

KEDAH 2010 [ P1 ] [ P2 , P3 ] [ ANS. SCHEM]

* credit goes to all the teachers who are willing to share these papers on the net

2009 Physics Trial Paper

SPM Physics 2009 Trial Paper:

1. Perlis 2009 [Marking scheme]
2. SBP2009 / P1 / P2 / P3 /Marking Scheme (credit to cikgu suriati)
3. Sabah 2009
4.Johor 2009

5. Pahang { P1 } {P2} {P3}
6. Kelantan 2009
7. Terengganu 2009

8. Selangor [ P2 ] [ P3 ] [
Skema ]
9. Negeri 9 [ P2 ] [ P3 ] [ Skema ]

10. Kedah [ P1 ] [P2 ] [ P3 ] [ SKEMA ]
11. MRSM [ P1 ] [ P2 ] [ P3 ]
12. Perak [ P2 ] [ Skema ]

Must DOwnload !!
Physics Score A Module

Support this blog:

If u find this site is useful, do contribute to help us improve.
Maybank account : 162188010552 Your contribution is highly appreciated.