Assigned: November 20, 2017 Due: On Nov 27, 2017 Chapters 7-9) Instructor Dr. Si

Question

Assigned: November 20, 2017 Due: On Nov 27, 2017 Chapters 7-9) Instructor Dr. Siva Paramasivam MAXIMUM POSSIBLE POINT 100 Section-1 (35 Points) Please CIRCLE the correct answer / answers for the following questions listed below Please do not forget to put your Name 1. Sunlight is a form of electromagnetic radiation and has all except which one of the following characteristics? A. The Sun emits many wavelengths in it spectrum of radiation. B. Some wavelengths from the Sun are not visible to the human eye. C. The human eye is most sensitive to the wavelength that is also the most intense produced by the Sun. D. The heat received from the Sun is about the same temperature as the Sun. 2. About 9 percent of the Sun's energy that reaches Earth is ultraviolet radiation. This radiation has which of the following characteristics? A. Wavelengths are shorter than visible light wavelength. B. Is more penetrating than visible light. C. Causes damage to human skin. D. All of the above 3. What are the three possible results that occur when light strikes matter? A. Light can be reflected, absorbed, or transmitted B. Light can be enhanced, absorbed, or transmitted. C. Light can be given more energy, diffused, or absorbed. D. Light can be enhanced, diffused, or absorbed. 4. How do opaque materials differ from transparent materials? A. B. C. Both A an B. Most light is transmitted through transparent materials whereas opaque materials mostly reflect and absorb light. Light reflected from opaque materials gives rise to color, transparent materials are largely colorless. D. Neither A nor B. 5. When an object is observed, the observation is a result of which interaction of light with matter /object? A. Transmission. B. Diffusion. C. Reflection. D. Absorption. 1 Page

Explanation / Answer

Answers:

1. Option D

The heat energy received from the sun is about the same temperature as the sun.

2. Option D

All of the above

3. Option A

Light can be reflected, absorbed, or transmitted

4. Option C

Both A and B

5. Option C

Reflection

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