Unit 8 Test - Waves and Electromagnetic Radiation

During a classroom demonstration, a teacher uses a prism to show how white light can be split into the various colors of the spectrum. Each color displayed has a distinct wavelength and frequency. Which of the following statements correctly describe the characteristics of visible light? Select 2 that are correct.

• Violet light has a shorter wavelength than green light.

• Green light has a longer wavelength than red light.

• Red light has a longer wavelength than blue light.

• Blue light has a shorter wavelength than yellow light.

Hal wonders about the properties of electromagnetic waves that make up the visible light spectrum. He conducts an experiment to see how sunlight behaves while moving through a prism. He is able to separate visible light into colors of the rainbow. He notices that each color has a unique wavelength and frequency. Hal researches how rainbows form. He learns that when light traveling through the air moves through water droplets, a rainbow forms. Which process names what happens when light is transmitted from air to water during the formation of a rainbow?

• absorption
• amplification
• reflection
• refraction

During a classroom demonstration, a teacher uses a prism to show how white light can be split into the spectrum of visible colors. Each color displayed has a distinct wavelength. The teacher then asks the students to arrange the colors in order from the longest wavelength to the shortest wavelength. Which of the following sequences correctly orders the colors from longest to shortest wavelength?

• red, orange, yellow, green, blue, violet

• violet, blue, green, yellow, orange, red

• yellow, green, blue, violet, orange, red

• blue, green, yellow, orange, red, violet

During a visit to a large cave, Alex yells and hears a repeating sound shortly after. What is the reason Alex hears this repeating sound?

• The sound waves are absorbed by the cave walls.

• The sound waves reflect off the cave walls, creating an echo.

• The sound waves are amplified naturally inside the cave.

• The sound is caused by other visitors.

During a science class experiment, Olivia and Noah observed that when they directed a beam of light and a sound wave from air into a water tank, the waves behaved differently. Which statement best describes how light and sound waves are affected when they move from air to water?

• Reflection occurs because of a change in speed of the wave.

• Refraction occurs because of a change in the speed of the wave.

• Diffusion occurs because of a change in the wavelength of the wave.

• Reflection occurs because of a change in the frequency of the wavelength.

In constructing a demonstration of a longitudinal wave for her physics class, what elements should Alice ensure to include? Select the correct statements.

• Longitudinal waves require a medium to propagate.

• Longitudinal waves can propagate in a vacuum.

• Compression and rarefaction are characteristics of longitudinal waves.

• Peaks and valleys are characteristics of longitudinal waves.

Jasmine is investigating radiant energy from the sun. She identifies different kinds of electromagnetic waves, and she notices that although most are not visible to the human eye, they share many properties. Which wave property is described as the distance a wave travels before repeating?

• frequency
• wavelength
• speed
• amplitude

Jasmine is investigating radiant energy from the sun. She identifies different kinds of electromagnetic waves, and she notices that although most are not visible to the human eye, they share many properties. Which wave property is described as the number of times a wave repeats in a given amount of time?

• frequency
• wavelength
• speed
• amplitude

Jasmine is investigating radiant energy from the sun. She identifies different kinds of electromagnetic waves, and she notices that although most are not visible to the human eye, they share many properties. Which wave property is described as the distance a wave travels in a certain amount of time.

• frequency
• wavelength
• speed
• amplitude

Jasmine is investigating radiant energy from the sun. She identifies different kinds of electromagnetic waves, and she notices that although most are not visible to the human eye, they share many properties. Which wave property is described as half the vertical distance from the trough to the crest of a wave?

• frequency
• wavelength
• speed
• amplitude