A v = f/lambda
B v = lambda/f
C v = f lambda
D v = f + lambda
Explanation: Wave speed equals frequency times wavelength.
A Increases
B Remains same
C Decreases
D Becomes zero
Explanation: Waves slow down in a denser medium while frequency stays constant.
A Crest and trough
B Any two points
C Two consecutive crests
D Wave and medium
Explanation: Wavelength is the distance between two consecutive identical points.
A Changes
B Doubles
C Remains constant
D Halves
Explanation: Frequency depends on the source and does not change.
A Longitudinal waves only
B Transverse waves only
C All waves
D EM waves only
Explanation: Superposition applies to all types of waves.
A Odd multiple of lambda/2
B lambda/4
C n lambda where n=0,1,2...
D 3 lambda/2
Explanation: Constructive interference occurs at integer multiples of wavelength.
A Maximum displacement
B Maximum amplitude
C Zero displacement
D Moving particles
Explanation: Nodes are points of zero displacement in a standing wave.
A Amplitude
B Speed
C Frequency due to relative motion
D Wavelength of source
Explanation: Doppler effect causes apparent frequency change due to relative motion.
A 340 m/s
B 1500 m/s
C 5000 m/s
D 300 m/s
Explanation: Speed of sound in air is approximately 343 m/s.
A Transverse waves
B Surface waves
C EM waves
D Longitudinal waves
Explanation: Sound waves are longitudinal waves with compressions and rarefactions.
A 10 m
B 50 m
C 34 m
D 17 m
Explanation: Sound must travel 34 m round trip at 340 m/s in 0.1 s, so 17 m.
A Driving frequency equals natural frequency
B Amplitude decreases
C Frequency decreases
D Speed is zero
Explanation: Resonance occurs when driving frequency matches natural frequency.
A Amplitude
B Speed
C Wavelength
D Frequency
Explanation: Pitch is determined by the frequency of the sound wave.
A Reflectors
B Lenses
C Obstacles
D Mirrors
Explanation: Diffraction is the bending and spreading of waves around obstacles.
A Decrease in temperature
B Increase in density
C Decrease in pressure
D Increase in temperature
Explanation: Speed of sound increases with temperature as molecules move faster.
A Frequency
B Wavelength
C Amplitude
D Speed
Explanation: Loudness is determined by the amplitude of the sound wave.
A Glass
B Water
C Vacuum
D Diamond
Explanation: Light travels at maximum speed (3x10^8 m/s) in vacuum.
A c/v
B v/c
C lambda_vac/lambda_med
D f_med/f_vac
Explanation: Refractive index n = c/v, speed in vacuum over speed in medium.
A Denser to rarer at angle > critical angle
B Rarer to denser
C Any medium to vacuum
D Vacuum to any medium
Explanation: TIR occurs from denser to rarer medium when angle exceeds critical angle.
A Reflection only
B Polarization
C Diffraction only
D Refraction and dispersion
Explanation: Rainbows form from refraction, dispersion, and internal reflection in water droplets.