# Ap Physics B - Waves pt 1

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B) all of these

### Two waves traveling in opposite directions on a rope meet and undergo complete destructive interference. Which of the following best describes the waves a moment after the waves meet and coincide? A) The waves reflect and travel backward. B) The waves continue unchanged. C) A single wave continues along the rope. D) The waves no longer exist.

B) The waves continue unchanged.

C) vibrating.

D) speed.

### As you face a plane mirror on the east wall of your room, you raise your north hand. Your image raises A) its left hand. B) its south hand. C) both hands. D) neither hand. E) its north hand.

E) its north hand.

D) refraction.

B) 2 m.

C) 2 hertz

### A common source of wave motion is a A) region of variable high and low pressure. B) harmonic object. C) none of these D) wave pattern. E) vibrating object.

E) vibrating object.

B) 6 m/s

C) 10 m/s.

A) refraction.

E) out of step.

A) 3 images.

### Like a transverse wave, a longitudinal wave has A) amplitude, wavelength, and speed. B) amplitude, frequency, wavelength, and speed C) amplitude, frequency, and wavelength. D) wavelength, speed, and frequency. E) amplitude, frequency, and speed.

B) amplitude, frequency, wavelength, and speed

B) the sum of

### Wave interference occurs for A) light waves. B) sound waves. C) All of the above choices are correct. D) None of the above choices are correct. E) water waves.

C) All of the above choices are correct.

A) vibration.

### If you know the wavelength of any form of electromagnetic radiation, you can determine its frequency because A) the speed of light increases as wavelength increases. B) wavelength and frequency are equal. C) the speed of light varies for each form. D) all wavelengths travel at the same speed.

D) all wavelengths travel at the same speed.

C) 2 hertz.

B) reflected.

C) X-rays

### https://forsyth.angellearning.com/AngelUploads/Content/SY13-SFH-30045y-601/_assoc/52748CDD6F5D45A9A604724DCFC746E1/nar003-1.jpg Which of the following types of interference will occur when the pulses in the figure above meet? A) no interference B) destructive interference C) total interference D) constructive interference

B) destructive interference

B) invisible.

### The source of all electromagnetic waves is A) changes in atomic energy levels. B) none of these C) vibrating atoms. D) crystalline fluctuations. E) accelerating electric charges.

A) changes in atomic energy levels.

### As a light ray enters or exits a water-air interface at an angle of 15 degrees with the normal, it A) always bends toward the normal. B) sometimes bends towards the normal. C) always bends away from the normal. D) does not bend.

B) sometimes bends towards the normal.

### If a light ray strikes a flat mirror at an angle of 30° from the normal, the ray will be reflected at an angle of A) 90° from the normal. B) 60° from the mirror's surface. C) 30° from the mirror's surface. D) 60° from the normal.

B) 60° from the mirror's surface.

### What is the formula to find speed of light? A) c = l/f B) c = lf C) l2/f D) c = f/l

B) c = lambda * frequency

### Sound waves A) do not require a medium for transmission. B) are transverse waves. C) are longitudinal waves. D) are a part of the electromagnetic spectrum.

B) are transverse waves.

B) 0.1 second.

### Light refracts when traveling from air into glass because light A) has greater intensity in air than in glass. B) has greater frequency in glass than in air. C) has greater intensity in glass than in air. D) travels slower in glass than in air. E) has greater frequency in air than in glass.

D) travels slower in glass than in air.

### Object and image for a plane mirror lie A) equal distances from the mirror. B) all of these C) at right angles to each other. D) along the same plane. E) none of these

A) equal distances from the mirror.

D) 2 m.

B) none of these

A) crests

### A wave travels an average distance of 1 meter in 1 second with a frequency of 1 hertz. Its amplitude is A) 1 meter. B) more than 1 meter. C) not enough information to say D) less than 1 meter.

C) not enough information to say

### When light passes through an ordinary window pane, its angle of emergence is A) usually less than its angle of incidence. B) the same as its angle of incidence. C) always more than its angle of incidence. D) usually more than its angle of incidence. E) always less than its angle of incidence.

B) the same as its angle of incidence.

B) refraction

A) speeds.

### When a straight line is drawn perpendicular to a flat mirror at the point where an incoming ray strikes the mirror's surface, the angles of incidence and reflection are measured from the normal and A) the angle of incidence is less than the angle of reflection. B) the angles of incidence and reflection are equal. C) the angle of incidence can be greater than or less than the angle of reflection. D) the angle of incidence is greater than the angle of reflection.

B) the angles of incidence and reflection are equal.

### https://forsyth.angellearning.com/AngelUploads/Content/SY13-SFH-30045y-601/_assoc/52748CDD6F5D45A9A604724DCFC746E1/nar002-1.jpg Which of the following types of interference will occur when the pulses in the figure above meet? A) constructive interference B) no interference C) total interference D) destructive interference

A) constructive interference

### Electromagnetic waves consist of A) high-frequency gravitational waves. B) particles of light energy. C) oscillating electric and magnetic fields. D) compressions and rarefactions of electromagnetic pulses.

C) oscillating electric and magnetic fields.

B) both of these

A) 3 m.

C) interference.

B) 3.0 m.

### Wave interference occurs for A) All of the above choices are correct. B) None of the above choices are correct. C) sound waves. D) light waves. E) water waves.

A) All of the above choices are correct.

B) diamond

D) two of these

D) sound

C) transverse.

### When light passes at an angle to the normal from one material into another material in which its speed is higher, A) it always lies along the normal to the surface. B) it is unaffected. C) it is bent away from the normal to the surface. D) it is bent toward the normal to the surface.

D) it is bent toward the normal to the surface.

### Interference colors for light are analogous to A) resonance for sound. B) the sonic boom for sound. C) partial tones for sound. D) beats for sound. E) Fourier analysis for sound.

D) beats for sound.

C) amplitude.

C) 20 m/s

Example: