What happens during reflection?, A. The wave passes through a new medium, B. The wave is converted into heat, C. The wave bounces off an obstruction, D. The wave stops moving, According to the law of reflection, which statement is true?, A. The angle of reflection is greater than the angle of incidence, B. The angle of incidence equals the angle of reflection, C. The reflected wave travels faster than the incident wave, D. The wave always bends toward the normal, What is the angle of incidence?, A. The angle between the reflected wave and the surface, B. The angle between the incident wave and the normal, C. The angle between the reflected wave and the normal, D. The angle between the wave and the obstruction, Which of the following is an example of reflection?, A. Light passing through glass, B. Sound disappearing in the air, C. An echo heard in a canyon, D. Water waves slowing down near shore, Why do some waves bounce off objects instead of passing through them?, A. The wave energy is destroyed, B. The wave is absorbed completely, C. The wave is blocked but its energy remains, D. The wave changes into another type of wave, What is refraction?, A. The bouncing of waves off a surface, B. The absorption of wave energy, C. The bending of waves due to a change in speed, D. The stopping of waves at a boundary, Why do waves bend when they move from one medium to another?, A. Because the wave gains energy, B. Because the wave changes speed, C. Because the wave reflects off the surface, D. Because the wave disappears, When does a wave change direction as it enters a new medium?, A. When it enters perpendicular to the surface, B. When it enters at an angle other than perpendicular, C. When it reflects off the boundary, D. When it is completely absorbed, What happens to light when it enters water at an angle?, A. It speeds up and bends upward, B. It slows down and bends downward, C. It reflects completely, D. It stops moving, What is the normal?, A. The direction the wave travels, B. The surface of the new medium, C. An imaginary line perpendicular to the boundary between two media, D. The reflected wave, What does it mean when a wave “bends toward the normal”?, A. The wave moves parallel to the surface, B. The wave reflects off the boundary, C. The wave changes direction closer to the perpendicular line, D. The wave stops at the boundary, What is diffraction?, A. The reflection of waves off a surface, B. The bending of waves due to a change in speed, C. The bending of waves around objects, D. The absorption of wave energy, Which situation is an example of diffraction?, A. Seeing your reflection in a mirror, B. Light slowing down in water, C. Hearing someone speak around a corner, D. Waves disappearing in the ocean, Which types of waves can show diffraction?, A. Only light waves, B. Only sound waves, C. Only water waves, D. Water waves and sound waves, What happens during absorption?, A. Waves bounce off a surface, B. Waves pass through a new medium, C. Wave energy is transferred to the material, D. Waves change direction, Which example best shows absorption?, A. Light reflecting from a mirror, B. Sound echoing in a canyon, C. Ocean waves losing energy at the shoreline, D. Light bending in water, What usually happens when light waves hit a material?, A. They are only absorbed, B. They are only reflected, C. They are reflected, refracted, or absorbed, D. They always pass straight through, What is constructive interference?, A. When two waves cancel each other out, B. When two waves combine to form a wave with greater amplitude, C. When two waves move in opposite directions, D. When a crest overlaps a trough, Constructive interference occurs when, A. A crest overlaps a trough, B. Two troughs overlap with smaller amplitudes, C. The crests of two waves overlap, D. Two waves move at different speeds, What happens when two troughs overlap during constructive interference?, A. They cancel out, B. They create a higher crest, C. They make a deeper trough, D. Nothing changes, What is destructive interference?, A. When waves add their energies together, B. When waves form a larger wave, C. When two waves combine to form a wave with smaller amplitude, D. When two crests overlap, Destructive interference occurs when... , A. Two crests overlap, B. A crest overlaps a trough, C. Two troughs overlap, D. Waves move in the same direction, If a crest and trough have equal amplitudes and overlap, what happens?, A. A larger crest forms, B. A deeper trough forms, C. They cancel each other out, D. The wave speeds up, If the crest has a larger amplitude than the overlapping trough, the result is:, A. Complete cancellation, B. A trough, C. A smaller wave, D. A reduced crest, Which device uses destructive interference to reduce sound?, A. Microphone, B. Loudspeaker, C. Radio, D. Noise-canceling headphones, What is a standing wave?, A. A wave that moves very slowly, B. A wave that appears to stand in one place, C. A wave that only travels in one direction, D. A wave that has no amplitude, Standing waves are produced by , A. Two waves traveling in the same direction, B. A single wave hitting an obstacle, C. Two waves interfering while traveling in opposite directions, D. Wind blowing across water, What are nodes in a standing wave?, A. Points of maximum amplitude, B. Points with zero amplitude, C. Points where waves speed up, D. Points where the rope breaks, How are nodes spaced along a standing wave?, A. Randomly, B. Unevenly, C. Evenly, D. Only at the ends, What are antinodes?, A. Points of zero amplitude, B. Points of maximum amplitude, C. Points where waves cancel permanently, D. Points where the rope is tied, Antinodes are located:, A. At the ends of the rope only, B. Randomly between nodes, C. Halfway between two nodes, D. Directly on the nodes, What is natural frequency?, A. The fastest speed an object can move, B. The frequency at which an object naturally vibrates, C. The loudest sound an object can make, D. The frequency created by wind, What is resonance?, A. A decrease in vibration, B. A wave that stands still, C. An increase in amplitude when vibrations match an object’s natural frequency, D. A vibration that cancels out, Resonance happens when:, A. Two objects move in opposite directions, B. External vibrations match an object’s natural frequency, C. An object stops vibrating, D. The frequency decreases, Why must engineers consider resonance when building bridges?, A. To make bridges lighter, B. To prevent wind from causing large vibrations that could collapse the bridge, C. To make bridges look better, D. To reduce traffic noise.

Wave Interaction

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