Section 1
Light Travels as Both Waves and Particles
Light moves as waves with wavelengths and frequencies but also behaves like particles called photons. It travels in straight lines at 300,000 km/s, can move through a vacuum, and carries energy.
Grade 5 students explore the properties of light in this lesson from Chapter 6 of Science: A Closer Look, learning how light travels as both transverse waves and particles called photons. Students investigate key concepts including wavelength, frequency, reflection, and refraction, and conduct a hands-on inquiry activity measuring angles of incidence and reflection using a mirror. The lesson also covers how light interacts with different materials and introduces the electromagnetic nature of light energy.
Section 1
Light Travels as Both Waves and Particles
Light moves as waves with wavelengths and frequencies but also behaves like particles called photons. It travels in straight lines at 300,000 km/s, can move through a vacuum, and carries energy.
Section 2
Light Creates Shadows and Colors When Meeting Matter
When light hits objects, it can scatter, be absorbed as heat, or pass through them. Transparent objects allow light through, translucent objects blur light, and opaque objects block light completely.
Section 3
Light Reflects and Bends When Changing Mediums
Following the law of reflection, light bounces off mirrors creating images. When passing between mediums, light refracts by bending due to speed changes, making straight objects appear bent in water.
Section 4
Colors Form When Light Separates into Wavelengths
White light contains all colors of the spectrum. Prisms and raindrops separate these wavelengths, with longer waves appearing red and shorter waves appearing violet. Objects appear colored based on which light they reflect.
Section 5
Electromagnetic Waves Extend Beyond Visible Light
Light is just one part of the electromagnetic spectrum. Other forms include radio waves, microwaves, infrared, ultraviolet, X-rays, and gamma rays - all traveling at light speed but with different wavelengths and energies.
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Section 1
Light Travels as Both Waves and Particles
Light moves as waves with wavelengths and frequencies but also behaves like particles called photons. It travels in straight lines at 300,000 km/s, can move through a vacuum, and carries energy.
Section 2
Light Creates Shadows and Colors When Meeting Matter
When light hits objects, it can scatter, be absorbed as heat, or pass through them. Transparent objects allow light through, translucent objects blur light, and opaque objects block light completely.
Section 3
Light Reflects and Bends When Changing Mediums
Following the law of reflection, light bounces off mirrors creating images. When passing between mediums, light refracts by bending due to speed changes, making straight objects appear bent in water.
Section 4
Colors Form When Light Separates into Wavelengths
White light contains all colors of the spectrum. Prisms and raindrops separate these wavelengths, with longer waves appearing red and shorter waves appearing violet. Objects appear colored based on which light they reflect.
Section 5
Electromagnetic Waves Extend Beyond Visible Light
Light is just one part of the electromagnetic spectrum. Other forms include radio waves, microwaves, infrared, ultraviolet, X-rays, and gamma rays - all traveling at light speed but with different wavelengths and energies.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter