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.
A 4.5 x 10^8 m/s
B 3 x 10^8 m/s
C 1.5 x 10^8 m/s
D 2 x 10^8 m/s
Explanation: v = c/n = 3x10^8/1.5 = 2x10^8 m/s.
A Violet
B Green
C Red
D Blue
Explanation: Red light has the longest wavelength (~700 nm) in visible light.
A 90 degrees
B 60 degrees
C 30 degrees
D 42 degrees
Explanation: Critical angle = sin-1(1/1.5) = 41.8 degrees.
A Reflection
B Refraction
C Scattering
D Diffraction
Explanation: Solar radiation pressure pushes the comet\'s tail away from the Sun.
A Beyond 2F
B At 2F
C Between F and lens
D Beyond F
Explanation: Convex lens forms virtual enlarged image between F and the lens.
A 1/f = 1/v - 1/u
B f = u + v
C 1/f = u/v
D 1/f = 1/v + 1/u
Explanation: Lens formula: 1/f = 1/v + 1/u.
A Only real images
B Only virtual images
C Both real and virtual images
D Neither
Explanation: Concave mirrors form both real and virtual images.
A 2 D
B 0.25 D
C 25 D
D 4 D
Explanation: P = 1/f = 1/0.25 = 4 diopters.
A Convex lens
B Bifocal lens
C Cylindrical lens
D Concave lens
Explanation: Myopia is corrected with a concave diverging lens.
A Reflection
B Diffraction
C Polarization
D Interference
Explanation: Young\'s experiment proves wave nature of light through interference.