How is white light different from the rest of the electromagnetic spectrum? White light is capable of altering its wavelength. O White light can travel through empty space and matter. O White light is invisible to the human eye. White light has a spectrum of visible colors.
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- Calculate the wavelength of the em wave required to ionize a hydrogen atom (i.e., remove the electron in the ground state so that H-atom becomes H+ion). Determine the frequency of this em wave. In which region of the electromagnetic spectrum does this em wave lie?Which of the following statements are true about light waves? O The shorter the wavelength, the higher the frequency. O The lower the frequency, the shorter the wavelength. O The lower the frequency, the longer the wavelength. O The higher the frequency, the longer the wavelength. O Higher frequency light travels faster than lower frequency light.You’re in a potions class and your friend has a bubbling cauldron of soup. You measure with a super-magic thermometer that reads 1808 K. Your skin is measured at 33 °C. Assume both examples radiate like a blackbody. a) What wavelength does the soup radiate at maximum intensity and which region of the electromagnetic spectrum does this wavelength correspond? b) Repeat part a) for your skin.
- Answer all. It is easy to answer all. ThanksVisible light is O a large portion of the full electromagnetic spectrum. O the only phenomenon presented during the lectures on Light. O a small portion of the full electromagnetic spectrum. O a portion of the electromagnetic spectrum that ranges from microwaves to ultraviolet light ... .. ..*** ...Unpolarized light with an initial intensity of 32 W/m2 is incident on a perfect polarizing material that allows light through with a vertical orientation. The light then passes through a second polarizer that is rotated 450 with respect to the first. Finally, the light passes through a third polarizer that is oriented at 900 with respect to the first. What is the intensity of light that makes it through the first polarizer? A. 0 What is the intensity of light that makes it through the second polarizer? B. 2 W/m2 |What is the intensity of light that makes it through all three polarizers? C. 4 W/m2 D. 8 W/m2 E. 16 W/m2 F. 32 W/m2
- An observer at a fixed distance from a light bulb measures the light intensity at her location to be 10 watts/m2. What is the maximum value of the electric field strength at the observer's location? a. 87 N/C b. 61 N/C c. 48 N/C d. 74 N/C e. 100 N/CHe-Ne (Helium-Neon) lasers are often used in physics demonstrations. Mine is labelled as about 5 mW and 650 nm. Let's approximate that the light is spread over a cylindrical beam about 1 mm in diameter. a. What's the intensity of the beam (approximately)? b. What are the maximum electric and magnetic field values? What are the average values? Explain briefly why those are different. c. What's the average energy density of the beam? d. What's the frequency of the EM wave?The intensity of a circularly polarized electromagnetic wave is found to be 800Wm2 What is the maximum electric field amplitude associated with this wave? Show the algebraic form of all equation(s) that you apply. Report your answer to the correct number of significant figures and units.