Wave Interference

Physics ⇒ Waves and Sound

Wave Interference starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Wave Interference. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 11

A sound wave of frequency 500 Hz interferes with another sound wave of the same frequency. If the speed of sound is 340 m/s, what is the wavelength of the sound?

A student observes 10 bright fringes in a double-slit experiment over a distance of 2 cm on the screen. What is the average fringe width?

Define coherent sources.

Describe how thin film interference produces colors in soap bubbles.

Describe the difference between interference and diffraction.

Explain what is meant by the term 'path difference' in the context of wave interference.

Explain why two independent light bulbs do not produce an observable interference pattern.

If the wavelength of light used in a double-slit experiment is increased, what happens to the fringe spacing?

If two waves of amplitude 3 units and 4 units interfere constructively, what is the amplitude of the resultant wave?

If two waves of amplitude 5 units and 2 units interfere destructively and are exactly out of phase, what is the amplitude of the resultant wave?

If two waves of amplitude A and B interfere destructively and are exactly out of phase, what is the amplitude of the resultant wave?

If two waves of equal amplitude and frequency interfere constructively, what is the amplitude of the resultant wave?

State the principle of superposition.

What is the path difference required for constructive interference?

What is the path difference required for destructive interference?

What is wave interference?

A thin film of oil (n = 1.4) floats on water (n = 1.33). If white light is incident perpendicularly, what is the minimum nonzero thickness of the oil film that will result in constructive interference for reflected light of wavelength 560 nm in air?

Explain why the central maximum in a double-slit interference pattern is always the brightest fringe.

If two waves of the same frequency and amplitude travel in opposite directions and interfere, what type of wave is formed?

In a laboratory, two speakers are placed 3 meters apart and emit sound waves of the same frequency in phase. A student walks along a line parallel to the line joining the speakers and 4 meters away from it. If the speed of sound is 340 m/s and the frequency is 170 Hz, at what positions along the line will the student hear maximum loudness?