Fenomena interferens berlaku apabila terdapat ______ sumber koheren yang menghasilkan gelombang.

(DLP) Interference phenomena occur when _____ coherent sources produce waves respectively.

• satu / one

• dua / two

• tiga / three

• empat / four

Corak yang dipaparkan dalam gambar adalah corak interferens bagi gelombang ?

(DLP) Pattern shown in the picture is interference pattern of which waves?

• air / water

• cahaya / light

• bunyi / sound

The diagram above shows the wavefronts produced in a ripple tank. What is the wavelength of the ripple?

Rajah di atas menunjukkan muka gelombang yang dihasilkan dalam tangki riak. Apakah panjang gelombang riak yang dihasilkan?

• 4 cm

• 8 cm

• 10 cm

• 20 cm

A mechanical wave is a wave that

Gelombang mekanik ialah gelombang yang

• needs a medium to propagate.

  memerlukan medium untuk merambat.

• can propagate in a vacuum.

  boleh merambat melalui vakum.

• have big wavelength.

  mempunyai panjang gelombang yang besar.

Which of the following quantity decreases when a system undergoes damping?

Kuantiti berikut yang manakah berkurang apabila suatu sistem megalami lembapan?

• Velocity

  Halaju

• Frequency

  Frekuensi

• Amplitude

  Amplitud

• Wavelength

  Panjang gelombang

Which of the following is NOT an electromagnetic wave?

Antara yang berikut, yang manakah BUKAN satu gelombang electromagnet?

• X-rays

  Sinar -X

• Visible light

  Cahayatampak

• Radio waves

  Gelombang radio

• Sound waves

  Gelombang bunyi

Which of the following is the same in gamma rays, ultra violet rays and visible light?

Antara berikut, yang mana adalah sama bagi sinar gama, sinar untra ungu and cahaya tampak?

• Frequency

  Frekuensi

• Velocity

  Halaju

• Wavelength

  Panjang gelombang

The _______________ determines the color of visible light.

• wavelength (and frequency)

• speed

• amplitude

• particles of the medium

All electromagnetic waves are...

• transverse waves and have the same frequency

• transverse waves and have the same speed

• mechanical waves and have the same wavelength

• longitudinal waves and have the same energy

Rays used to take pictures of bones of human body

• X-ray

• Light

• Photo

• None of the above