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- 1. In sunlight, you see a blue truck. What colors of light is the truck absorbing, and what colors of light is the truck reflecting? Explain your answers. In winter, a pile of snow has a bright white color. Use this fact to explain why it takes a lot of time for a pile of snow to melt in the sunlight.8. What is the speed of light in diamond (n = 2.42)? Why does the speed of light change when light passes through material that is denser than air? 9. Using Snell's Law: if n2>n₁, what is the relationship between ₁ and ₂?The direction that a light wave bends once it enters the refracted medium depends on a. The index of refraction of the incident medium only. b. The indices of refraction of both the incident and refracted media. C. The angle of incidence of the incident light ray only. d. The index of refraction of the refracted medium, only.
- A device that analyzes light by spreading it out according to wavelength is called a(n) a. interferometer. b. camera. c. photometer. d. spectrograph.When light passing through a prism undergoes dispersion, the effect is a result of:a. different wavelengths traveling at different speeds.b. different wavelengths having different indices of refraction.c. different wavelengths refracting differently.d. All of the above2. The nearest star to earth is the Proxima Centauri. It is approximately 4.2 lightyears away from our planet. a) Express this distance in km and in the astronomical unit. b) Calculate the time that it will take for this star's light to reach earth. 3. Find the weights of gelatin and butter contained in a cubic box with a side dimension of 0.03 cm. Gelatin has a density of 79 Ib/ft² while butter has a density of 53 lb/ft’.
- What is the defining characteristic of a perfect blackbody? a. It looks black in ordinary white light. b. It absorbs all radiation incident on it. c. The temperature of a glacier increased over time. d. It has a surface temperature of absolute zero. e. It has a surface that reflects 50% of light evenly across all frequencies22. A TV screen has 3,000,000 pixels. If the screen shows an image that is 1/4 yellow, 1/2 cyan, and 1/4 magenta. How many of each color light are lit up?13. Which of the following statements BEST explains why we see red color in a red shirt? * O A. Red shirt absorbs red color. O B. Red shirt absorbs all color and reflects red color. O C. Red shirt disperses white light then emits red color. O D. Red shirt scatters white light and reflects red color.
- 5. When light goes from one material into another material having a higher index of refraction, A. its speed decreases but its wavelength and frequency both increase. B. its speed and wavelength decrease, but its frequency stays the same. C. its speed, wavelength, and frequency all decrease. D. its speed increases, its wavelength decreases, and its frequency stays the same. E. its speed decreases but its frequency and wavelength stay the same.Which of these does NOT describe an effect of the atmosphere on astronomical observation? Answers: A. Filtering out infrared and other wave bands. B. Unsteady or turbulent air. C. Decreased light-gathering power. D. Scattering light from nearby cities. E. Weather conditions.1. If the visible light wavelength is changed? What else has changed? 2. A light ray traveling through air meets the boundary with glass. What happens to the light wave? What happens to the angle of refraction? 3. Describe what additive and subtractive color light theory is. If an object is a certain color, what light is it reflecting on? What light is it observing?