IEB Physics Exam Questions & Answers
2025/2026
A pulse - ANSWERSA single disturbance in a medium that moves from one point to another
Medium - ANSWERSMaterial through which a pulse moves
Transverse pulse - ANSWERSA pulse where the particles disturbed move perpendicularly to the
direction in which the pulse is moving
Amplitude - ANSWERSThe maximum displacement of a particle in the medium from its rest
position (equilibrium)
Interferende - ANSWERSWhen two or more pulses meet at the same time in the same space
Superposition - ANSWERSThe vector addition of two pulses that occupy the same space at the
same time
Constructive interference - ANSWERSOccurs when the the superposition of two pulses results in
a new pulse with greater amplitude
Destructive interference - ANSWERSOccurs when the superposition of two pulses results in a
new pulse with a smaller amplitude
Transverse wave - ANSWERSA succession of transverse pulses in which the particles of the
medium move at right angles to the direction of the wave
, Crest - ANSWERSHighest point on a wave
Trough - ANSWERSLowest point on a wave
Amplitude - ANSWERSMaximum displacement from the position of rest
Wavelength (lambda) - ANSWERSThe distance between to successive particles in phase
Points in phase - ANSWERSMove in the same direction at the same speed and have the same
displacement from the position of rest
Period - ANSWERSThe time taken for a complete wave to pass a fixed point (in s)
Frequency - ANSWERSNumber of complete waves that pass a fixed point per second (in Hz)
Wave speed (v) - ANSWERSThe distance travelled by a wave in a second (m/s)
Longitudinal wave - ANSWERSA wave in which the particles in the medium move parallel to the
direction of propagation of the wave
Sound wave - ANSWERSPressure waves caused by vibrations
Vibrations - ANSWERSCause regions of compression and rarefaction in the air
electromagnetic radiation - ANSWERSTravels at the speed of light and does not need a medium
Photon - ANSWERSA quantum of light
2025/2026
A pulse - ANSWERSA single disturbance in a medium that moves from one point to another
Medium - ANSWERSMaterial through which a pulse moves
Transverse pulse - ANSWERSA pulse where the particles disturbed move perpendicularly to the
direction in which the pulse is moving
Amplitude - ANSWERSThe maximum displacement of a particle in the medium from its rest
position (equilibrium)
Interferende - ANSWERSWhen two or more pulses meet at the same time in the same space
Superposition - ANSWERSThe vector addition of two pulses that occupy the same space at the
same time
Constructive interference - ANSWERSOccurs when the the superposition of two pulses results in
a new pulse with greater amplitude
Destructive interference - ANSWERSOccurs when the superposition of two pulses results in a
new pulse with a smaller amplitude
Transverse wave - ANSWERSA succession of transverse pulses in which the particles of the
medium move at right angles to the direction of the wave
, Crest - ANSWERSHighest point on a wave
Trough - ANSWERSLowest point on a wave
Amplitude - ANSWERSMaximum displacement from the position of rest
Wavelength (lambda) - ANSWERSThe distance between to successive particles in phase
Points in phase - ANSWERSMove in the same direction at the same speed and have the same
displacement from the position of rest
Period - ANSWERSThe time taken for a complete wave to pass a fixed point (in s)
Frequency - ANSWERSNumber of complete waves that pass a fixed point per second (in Hz)
Wave speed (v) - ANSWERSThe distance travelled by a wave in a second (m/s)
Longitudinal wave - ANSWERSA wave in which the particles in the medium move parallel to the
direction of propagation of the wave
Sound wave - ANSWERSPressure waves caused by vibrations
Vibrations - ANSWERSCause regions of compression and rarefaction in the air
electromagnetic radiation - ANSWERSTravels at the speed of light and does not need a medium
Photon - ANSWERSA quantum of light
