Problem #7 Given the light fixture on the picture. In this device you will be able to change the beam angle from 5 to 60 degrees. Assume an isometric distribution of the light on the illuminated surface 1) If the distance to the floor is 3 meters, what will be the beam Beam angle that will produce an Illuminated surface Diameter of 2 meters? 2) Angle (4) If the lamp is an LED lamp with a nominal power consumption of 20 watts, what will be the illuminance on the illuminated circle? Illuminated Surface Diameter Light Fixture Distance-
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- A lamp of 500 cd is placed at the center of a room, 20m x 10m x 5m. Calculate the illumination in each corner of the floor. a. 0.98 lux b. 0.81 lux c. 0.78 lux d. 0.83 luxPart A An aquarium filled with water (n = 1.33) has flat glass sides whose index of refraction is 1.52. A beam of light from outside the aquarium strikes the glass at a 43.5° angle to the perpendicular (Figure 1). What is the angle of this light ray when it enters the glass? Express your answer using three significant figures. ? 02 = Submit Request Answer Figure 1 of 1 Glass Part B Air What is the angle of this light ray when it enters the water? Water Express your answer using three significant figures. ? 43.5° 03 = Submit Request AnswerOne well-known image of a prism is the following picture a. Given the pattern of light on the far side of the prism, is the index of refraction inside the prism higher or lower than the index of refraction outside the prism? b. List at least one thing that is wrong with this diagram given what we expect the dependence of n on the wavelength of light to be (and assuming the prism is made of a uniform material). c. List at least one thing that is right with this diagram given what we expect the dependence of n on the wavelength of light to be (and assuming the prism is made of a uniform material).
- Given the light fixture on the picture. In this device you will be able to change the beam angle from 5 to 60 degrees. Assume an isometric distribution of the light on the illuminated surface 1) If the distance to the floor is 3 meters, what will be the beam angle that will produce an Illuminated surface Diameter of 2 meters?need help with this, thank youPart A The color of dyes results from the preferential absorption of certain wavelengths of light. Certain dye molecules consist of symmetric pairs of rings joined at the center by a chain of carbon atoms, as shown in (Figure 1). Electrons of the bonds along the chain of carbon atoms are shared among the atoms in the chain, but are repelled by the nitrogen-containing rings at the end of the chain. These electrons are thus free to move along the chain but not beyond its ends. They look very much like a particle in a one-dimensional box. For the molecule shown, the effective length of the "box" is 0.85 nm. Assuming that the electrons start in the lowest energy state, what is the longest wavelength this molecule will absorb? Express your answer with the appropriate units. На ? A₁ = Value Units Submit Request Answer ▾ Part B Assuming that the electrons start in the lowest energy state, what is the second longest wavelength this molecule will absorb? Express your answer with the appropriate…
- You (height of your eyes above the water, h = 1.80 m) are standing 2.00 m from the edge of a 2.50-m-deep swimming pool (Figure 1). You notice that you can barely see your cell phone, which went missing a few minutes before, on the bottom of the pool. The index of refraction of water at this temperature is 1.333. Part A How far from the side of the pool is your cell phone? Express your answer with the appropriate units. ? d = 1.841 m Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Provide Feedback gure 1 of 1 K2.00 m 2.50 m2 Problem 2 Assume two adjacent interstellar gas clouds with known thickness dị and d2 found in front of an astronomical light source. Suppose that this source emits a beam of radiation with known specific intensity 1, as it enters the first cloud of interstellar gas. Calculate the specific intensity I, immediately after this beam has traversed the two clouds of gas. Assume that the densities (p1 and p2) and the opacities (k,1 and ky,2) are constant within the clouds and are known quantities and that these clouds possess no emissivity. (Note the relationship between the opacity and absorption coefficient a, = pk,. See Rybicki and Lightman eq. 1.22.) %3DDraw and label diagrams showing how the following photos were taken: 1 3 2 4