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A film of oil on a puddle in a parking lot shows a variety of bright colors in swirled patches. What can you say about the thickness of the oil film? (a) It is much less than the
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- According to the Young-Helmholtz theory of color vision, humans have cell receptors called "cones" in their retina that have peak sensitivities in the Red, Green and Blue wavelength ranges. When light reflects off a surface, we perceive the color or colors that are reflected; other colors are absorbed by the material. Which TWO of the following statements are correct? Because leaves on a plant reflect green light when illuminated by white light, other colors are absorbed and are therefore necessary for photosynthesis. If a yellow light illuminates a white book, the reflection will cause the red and green cones of an observer to be stimulated and will send a signal to the brain by way of the optic nerve. If both a red light and a green light illuminate a white book, the reflection will cause the blue cones of an observer to be stimulated and will send a signal to the brain by way of the optic nerve. Because leaves on a plant reflect green light when illuminated by white light, the green…arrow_forwardDirect observation of a standing wave pattern associated with light is difficult. The most relevant reason is that the eye is insensitive to fluctuations in intensity that occur at those frequencies. there is no convenient means of setting up the conditions for standing waves. the eye cannot resolve a pattern with that spacing. Hold it! In principle, light is not capable of producing standing waves.arrow_forward10. Three polarizing disks have planes that are parallel and centered on a common axis. The direction of the transmission axis (dashed line) in each case is shown relative to the common vertical direction. A polarized beam of light (with its axis of polarization parallel to the horizontal reference direction) is incident from the left on the first disk with intensity S, = 820 W/m2. Calculate the transmitted intensity if 0₁ = 21.0°, 0₂ = 34.0°, and 03 = 44.0°. W/m² Horizontal 8₁ 0₂arrow_forward
- A monochromatic light of wavelength 316 nm in air is passing through a piece of glass of index of refraction n. The angle of incidence and refraction are 0₁ = 60° and 0₂ = 46° as shown in the figure. What is the speed of light in the glass? (c = 3.00 x 108 m/s) nair = 1 n a) 2.49 x 108 m/s b) 1.82 x 108 m/s c) 3.0 x 108 m/s d) 5.0 x 108 m/s e) None of these is correct. Write your ownarrow_forwardPlease asaparrow_forwardpleasearrow_forward
- Two soap bubble are floating in air. Each bubble has the shape of a spherical shell and a refractive index of 1.35. Bubble A has a wall thickness of 120 nm, while bubble B has a wall thickness of 85 nm. For each buble, calculate the wavelength of visible light that is most strongly reflected. What colors do the two wavelengths correspond to?arrow_forwardThe wavelength of red light from a helium-neon laser is 633 nm in air and 479 nm In a medium of index of refraction n. The speed v and the frequencyfof light in the given medium are: (Given: c = 3 x 10*8 m/s, and 1 nm = 10^-9 m) O v = 2.27 x 10°8 m/s;f=6.26 x 10*14 Hz O v = 2.64 x 10°8 m/s;f= 5.39 x 10*14 Hz O v = 245 x 10°8 m/s; f= 5.80 x 10*14 Hz O v= 227 x 10°8 m/s;f = 4.74x10^14 Hz O v=2.64 x 10*8 m/s; f = 4.74 x 10*14 Hz O v= 2.45 x 10*8 m/s;f = 4.74 x 10*14 Hzarrow_forwardUnpolarized light is passed through an optical filter that is oriented in the vertical direction. 1)If the incident intensity of the light is 86 W/m^2, what is the intensity of the light that emerges from the filter? (Express your answer to two significant figures.)arrow_forward
- 4arrow_forward= A bubble is formed by a soap film with index of refraction n 1.3 and a thickness of 325nm. When illuminated by white light and viewed directly (perpendicular to the surface), what wavelength in the visible spectrum (375nm to 725nm) will be strongly reflected?arrow_forwardA parallel beam of monochromatic light of wavelength λ= 5890 A° is incident on a thin film of µ=1.5 such that the angle of refraction is 60°. Find the minimum thickness of the film so that it appears dark. options 2.96 x 10-5 cm 1.26 x 10-5 cm 3.926 x 10-5 cm 1.66 x 10-5 cmarrow_forward
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