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I am a full time specialist Physics tutor operating in Klang Valley. I've been educating student for more than 10 years. My specialty is to transform student that had failed their physics subject into a better result. Even some of them managed to get an A in their final exam, You can read their testimony in this blog. I provide home tuition for physics subject to those living nearby KL especially around W.Maju, Ampang,Melawati and Setiawangsa. At the same time i 'm giving online tuition to all malaysia & overseas student. For tuition centre looking for a physics tutor, i'm also able to give seminar and conduct weekly classes. Meanwhile,for school teachers who are organising physics seminar, i am happy to assist u in that aspect. If u have enquiry on my service, do contact or whatsap me at 017-2877589 or email me at fizbro @ gmail . com

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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 :)


yusri said...

nak tanya maksud koheren yang sebenarnya

Cikgu fizik said...

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

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