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27 Cards in this Set
- Front
- Back
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What type of energy is essential to life on earth?
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light (sunlight)
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How is the energy transferred and used by life on earth?
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Light is radiated from the sun to the earth. Light is absorbed and converted to heat. Sunlight is used by plants to make food
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Visible light travels in a straight line. How do you know?
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refection and lasers, both can be referred to explain this
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How do the colors of visible light differ from one another?
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different colors = different wavelengths
red - longest wavelength violet- shortest wavelength |
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What are the three primary colors of light?
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red, blue, and green
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What is the relationship between wavelength and energy?
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shorter wavelength = higher frequency = more energy vs.
longer wavelength = lower frequency = less energy |
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What color has the longest wavelength?
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red
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What color has the highest wave frequency?
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violet
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Out of violet and red, which of these has more energy?
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violet
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Explain the process by which our eye observes a BLUE OPAQUE object
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Blue opaque objects reflect blue light, and absorbs all other colors of light. The blue reflected light enters the eye and is observed
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Explain how light interacts with a RED, TRANSPARENT surface.
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When white light falls on a red transparent surface, red light is transmitted by the surface while other colors (OYGBiV) are absorbed
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What happens to a beam of light as it moves away from its source? What happens to the area of illumination and the energy in a given area?
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As a beam of light moves away from its source, the light spreads out (4x) there by illuminating a greater area and becoming dimmer (less bright). The area of illumination increases.
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What happens to light as it passes between air and water?
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reflection - angle of reflection (angle of exiting reflected light) = angle of of incidence (angle of entry)
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When does light refract?
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When it changes speed
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A beam of light bends when it passes from air to water, and then bends even more when it passes from water into glass. What can you conclude from this fact?
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Glass in denser than water
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Why does WHITE LIGHT from the sun form a rainbow when it passes through droplets of water in the atmosphere?
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The colors that make up white light refract at different angles
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What is the formula for calculating heat?
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Heat=mass x specific heat x change in temperature
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If a white test tube with the same amount of water was placed next to the black test tube, how much energy would it gain?
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Less, because black absorbs all of the light while the white reflects all visible light
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opaque
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not able to see through
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transparent
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allowing light to pass through so objects and words can be directly seen and read behind it
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reflection
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the amount of light that is thrown back; bouncing off
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refraction
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when light bends and each ray of light is separated
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transmission
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the passing through
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index of refraction
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Is the
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Critical Angle
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all light is reflected, no light is refracted or transmitted
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absorption
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taking in, soaking in
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wavelength
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the distance between the crests of a wave
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