Wave Reflection and Transmission
Physics ⇒ Waves and Sound
Wave Reflection and Transmission starts at 8 and continues till grade 12.
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See sample questions for grade 12
A wave pulse is sent down a rope attached to a heavier rope. Describe what happens at the boundary.
A wave pulse on a rope reaches a free end. What is the phase of the reflected pulse compared to the incident pulse?
A wave traveling along a string encounters a fixed end. What happens to the wave upon reflection?
Describe the difference between specular and diffuse reflection of waves.
Describe what happens to the amplitude of a wave when it is partially transmitted into a medium with higher impedance.
Explain why a wave is inverted when it reflects from a fixed boundary but not from a free boundary.
Explain why an echo is heard when a sound wave reflects off a distant wall.
A sound wave traveling in air strikes a boundary with a wall at an angle of 40° to the normal. If the wall absorbs 10% of the incident energy, what percentage of the energy is reflected and what percentage is transmitted?
When a wave passes from a less dense medium to a more dense medium, which of the following statements is true about the reflected wave? (1) It is inverted. (2) It is not inverted. (3) Its speed increases. (4) Its frequency changes.
Which of the following best describes the transmission of a wave at a boundary between two media? (1) The wave disappears. (2) The wave continues into the new medium, possibly with a change in speed and wavelength. (3) The wave is always inverted. (4) The wave's frequency always changes.
Which of the following best describes what happens to the wavelength of a wave as it moves from a medium with lower speed to a medium with higher speed? (1) It increases. (2) It decreases. (3) It remains the same. (4) It becomes zero.
Which of the following is a necessary condition for total internal reflection to occur? (1) The wave must travel from a denser to a rarer medium. (2) The angle of incidence must be less than the critical angle. (3) The wave must travel from a rarer to a denser medium. (4) The boundary must be rough.
Fill in the blank: The ______ coefficient measures the fraction of wave energy reflected at a boundary.
Fill in the blank: The ______ of a wave remains unchanged when it passes from one medium to another.
Fill in the blank: The angle of incidence is measured from the ______ to the direction of the incident wave.
Fill in the blank: The ratio of the amplitude of the transmitted wave to the incident wave at a boundary is called the ______ coefficient.
True or False: The energy of a wave is always completely reflected at a boundary between two media.
True or False: The frequency of a wave changes when it is reflected at a boundary.
True or False: The law of reflection applies to both sound and light waves.
True or False: The phase of a transmitted wave always changes at a boundary.
