Types of Waves
EM Spectrum
Wave Properties
Lenses
100
Which letter(s) show the crest of a wave?
V & Y show the crest of a wave.
100
The diagram shows the electromagnetic spectrum. Which electromagnetic wave has the most energy?
Gamma rays have the most energy because they have the highest frequency and shortest wavelength.
100
Which of the following waves require a medium to travel through?
A. infrared waves
B. sound waves
C. microwaves
D. gamma waves
B. sound waves
100
The lens shown in the diagram causes the light rays entering the lens to spread out.
Which of the following statements describe an application best suited for the lens shown in the diagram?
A. A flashlight that will allow light exiting the flashlight to reach a larger area.
B. A television projector that will break white light into a spectrum of different colors.
C. A telescope that will make an object appear larger.
D. Binoculars that will make an image appear closer.
A. A flashlight that will allow light exiting the flashlight to reach a larger area.
200
Between which two points shows the amplitude of the wave?
Between V & W shows the amplitude (from rest to crest).
200
A scientist is designing a device that will mimic Earth's atmosphere by blocking high-energy waves from the Sun. Pick three high-energy waves that the device should be able to block: radio waves, microwaves, infrared, ultraviolet, x rays, gamma rays.
Gamma rays
X Rays
Ultraviolet
200
What is the difference between a reflected and a diffracted sound wave?
Reflected sound waves bounce back to the place of origin. Diffracted sound waves change direction as they pass through an opening.
200
Why do lenses cause light rays to converge or diverge?
Lenses have curved surfaces that change the speed and direction of light as it passes through, causing the rays to either move closer together or spread apart.
300
How are electromagnetic and mechanical waves different?
Mechanical waves can only travel through a medium like a solid, liquid, or gas.
Electromagnetic waves can travel through a complete vacuum like space.
300
A student created a chart that shows information about the electromagnetic spectrum.
The student made a mistake on his diagram. Which mistake did he make?
Gamma rays can be used to shrink cancer cells, not cook food.
300
Why does a red shirt appear red?
The shirt absorbs all other colors but reflects red.
300
Why are convex lenses commonly used in magnifying glasses?
Convex lenses bring light rays together to make objects appear larger and easier to see.
400
Look at the transverse wave below. The wavelength of this wave is equal to the distance between which two points?
B & F
You can measure wavelength crest to crest or trough to trough.
400
What is the correct order of the electromagnetic spectrum, from longest wavelength to shortest wavelength?
400
Why does light refract at different angles?
Different colors of light refract differently because they have different wavelengths.
400
How do microscopes and telescopes use lenses differently?
Microscopes use lenses to magnify small nearby objects, while telescopes use lenses to collect and focus light from distant objects.
500
Anthony is looking at a diagram of two waves. Which question will best help Anthony determine which wave is transverse and which wave is longitudinal?
In what direction does each wave transfer energy?
500
What is the relationship between wavelength and frequency?
As wavelength increases, frequency decreases.
As wavelength, decreases, frequency increases.
Long wavelengths= low frequency= low energy
Short wavelengths= high frequency= high energy.
500
Light was refracted.
500
How does changing the position of an object affect the image formed by a lens?
Moving the object closer or farther from the lens changes the image’s size and location. In some cases, the image may flip upside down or become virtual.