ESAT (Engineering and Science Admissions Test) · Physics

Waves

8 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 8 questions

Sound travels at $340 m/s$ in air. What is the wavelength of a $500 Hz$ note?
Glass has refractive index $1.5$ . What is $sin c$ for light inside the glass meeting a glass-air boundary, where $c$ is the critical angle?
Light of wavelength $600 nm$ passes through two slits $0.30 mm$ apart onto a screen $2.0 m$ away. What is the fringe spacing?
Which statement explains why sound waves cannot be polarised?
Light enters glass of refractive index $1.5$ from air at an angle of incidence of $3 0^{\circ}$ . What is the value of $sin r$ , where $r$ is the angle of refraction?
A string of length $1.2 m$ is fixed at both ends. Waves travel along it at $60 m/s$ . What is the frequency of the fundamental mode?
The intensity of light from a small lamp is $I$ at a distance of $4 m$ . What is the intensity at $12 m$ ?
A wave generator produces $5$ complete waves in $0.020 s$ . What is the frequency?

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