Building contractors often install double-glazed windows to prevent thermal energy (heat) from entering or exiting a building. In addition to being effective insulators, such windows present interesting optical effects. In the figure, a double-glazed window consists of two identical panes of glass (ng = 1.54), each yg = 12.0 mm thick, separated by an air gap of y₁ = 9.60 mm. If light incident on the glass makes an angle of = 40.00° with respect to the glass, find the shift in path Ax as the light enters the room. Use na = 1.00 for the index of refraction of air. Ax = 6.98 Incorrect mm Enter numeric value glass air glass

Building contractors often install double-glazed windows to prevent thermal energy (heat) from entering or exiting a building. In addition to being effective insulators, such windows present interesting optical effects. In the figure, a double-glazed window consists of two identical panes of glass (ng = 1.54), each yg = 12.0 mm thick, separated by an air gap of y₁ = 9.60 mm. If light incident on the glass makes an angle of = 40.00° with respect to the glass, find the shift in path Ax as the light enters the room. Use na = 1.00 for the index of refraction of air. Ax = 6.98 Incorrect mm Enter numeric value glass air glass

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter9: Optics

Section: Chapter Questions

Problem 25Q

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Building contractors often install double-glazed windows to prevent thermal energy (heat) from entering or exiting a building. In addition to being effective insulators, such windows present interesting optical effects. In the figure, a double-glazed window consists of two identical panes of glass (ng = 1.54), each yg = 22.0 mm thick, separated by an air gap of y₁ = 17.6 mm. Use na = 1.00 for the index of refraction of air. If light incident on the glass makes an angle of d = 40.00° with respect to the glass, find the shift in path Ax as the light enters the room. Ax = glass air glass mm
The hot water needs of a household are to be met by heating water at 55°F to 200°F by a parabolic solar collector at a rate of 4 lbm/s. Water flows through a 1.25-in-diameter thin aluminum tube whose outer surface is blackanodized in order to maximize its solar absorption ability. The centerline of the tube coincides with the focal line of the collector, and a glass sleeve is placed outside the tube to minimize the heat losses. If solar energy is transferred to water at a net rate of 350 Btu/h per ft length of the tube, determine the required length of the parabolic collector to meet the hot water requirements of this house. Also, determine the surface temperature of the tube at the exit.
(a) A homeowner has a solar water heater installed on the roof of his house (as shown). The heater is a flat, closed box with excellent thermal insulation. Its interior is painted black, and its front face is made of insulating glass. Its emissivity for visible light is 0.900, and its emissivity for infrared light is 0.700. Light from the noontime Sun is incident perpendicular to the glass with an intensity of 1 000 W/m2, and no water enters or leaves the box. Find the steady-state temperature of the box’s interior. (b) What If? The homeowner builds an identical box with no water tubes. It lies flat on the ground in front of the house. He uses it as a cold frame, where he plants seeds in early spring. Assuming the same noontime Sun is at an elevation angle of 50.0°, find the steady-state temperature of the interior of the box when its ventilation slots are tightly closed.
The hot-water needs of a household are to be met by heating water at 55°F to 180°F by a parabolic solar collector at a rate of 4 lbm/s. Water flows through a 1.25-in-diameter thin aluminum tube whose outer surface is black-anodized in order to maximize its solar absorption ability. The centerline of the tube coincides with the focal line of the collector, and a glass sleeve is placed outside the tube to minimize the heat losses. If solar energy is transferred to water at a net rate of 400 Btu/h per ft length of the tube, determine the required length of the parabolic collector to meet the hot-water requirements of this house.
(1) If the temperature of the body is 90°C to falls to 70°C in 5 minutes when placed in a surrounding of constant temperature 20°C, calculate the time for the temperature of the body to become 50°C. Find the k constant. (2) Apply Snell's law when light travels from air (n = 1.0003) to a flint glass (n = 1.56) where Oi -30° (3) A 5-cm-high object is placed in front of a concave mirror with a radius of curvature of 20 cm. Determine the image height if the object's distance is 30 cm. (4) the other aw give the angle of incidence. Figure 4
The definition of 0 degrees Celsius is the equilibrium temperature between water and …………… If two objects are placed together and neither one undergoes any change, they have the same …………………. If the critical angle for total internal reflection inside a certain transparent material is found to be 48.00, calculate the index of refraction of the material. The speed of a sound wave in air depends only on ……………. Light bends on entering glass from air because its ……...is less in the glass. Diffraction around corners is greater when the ………. is larger. Two point on a wave that are at half-wavelength apart are …….…. degrees out of phase with each other. In a dispersive medium, the speed of light is a function of ………………
Calculate the contact angle θ for olive oil if capillaryaction raises it to a height of 7.07 cm in a glass tube with aradius of 0.100 mm. Is this value consistent with that for mostorganic liquids?
The skin reflects most visible and IR-A (near-infrared) radiation. The epidermis is highly absorbing at UV-B and UV-C wavelengths and at IR-B and IR-C wavelengths. True or False
Consider a 100-W incandescent light bulb that emits light uniformly in all directions. What pressure does the light emitted by this bulb exert on a mirror at a distance of r if Pv of the power is emitted as visible light?
A copper sphere of 1.01m diameter is coated with lamp black and maintained at a temperative of 513° K. flow much energy is radiated in two minutes ? (Stefan's constant = 5·7x10°³f/m²k²s).
A 300cm3 glass beaker at 20oC is filled completely with liquid mercury also at 20oC. If BOTH the beaker and its content are heated to 100oC, how much mercury will spill from the beaker?
The rate at which radiant energy from the sun reaches theearth’s upper atmosphere is about 1.50 kW/m2. The distance fromthe earth to the sun is 1.50 * 10^11 m, and the radius of the sun is6.96 * 10^8 m. (a) What is the rate of radiation of energy per unit areafrom the sun’s surface? (b) If the sun radiates as an ideal blackbody,what is the temperature of its surface?