(a)
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Santa checks himself for soot, using his reflection in a silvered Christmas tree ornament 0.750 m away. The diameter of the ornament is 7.20 cm. Standard reference texts state that he is a “right jolly old elf,” so we estimate his height to be 1.6 m. Where and how tall is the image of Santa formed by the ornament? Is it erect or inverted?
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- Suppose you are looking at your reflection in a shiny round holiday tree ornament.(a) If you are 0.25 m away and the ornament is 8.0 cm in diameter, where will your image be located?(b) Describe the features of the image. (Real? Virtual? Upright? Inverted? Enlarged? Reduced?)A glass sphere (n = 1.50) with a radius of 20.0 cm has a tiny air bubble 4.30 cm above its center. The sphere is viewed looking down along the extended radius containing the bubble. What is the apparent depth of the bubble below the surface of the sphere?Tanya enters her dark bedroom at night with only a flashlight. She aims the light beam downward, in the direction of a small mirror, mounted near the bottom of the opposite wall. Her floor is completely covered with a pure black rug. If she looks in the direction of the mirror, what will she most likely see?(the flashlight, her face, her pants, her shoes, just black, or something else)? Draw in arrows to justify your answer
- A dedicated sports car enthusiast polishes the inside and outside surfaces of a hubcap that is a section of a sphere. When he looks into one side of the hubcap, he sees an image of his face 10.9 cm in back of it. He then turns the hubcap over, keeping it the same distance from his face. He now sees an image of his face 28.3 cm in back of the hubcap. (a) How far is his face from the hubcap? (b) What is the magnitude of the radius of curvature of the hubcap? cm Submit Answer 14 Deimant DETAILS MY NOTES SEDCD10 .22 0.010. ASK YOUR TEACHERThe figure shows a small lightbulb suspended at distance d₁ = 290 cm above the surface of the water in a swimming pool where the water depth is d2 = 230 cm. The bottom of the pool is a large mirror. How far below the mirror surface is the image of the bulb? (Hint: Construct a diagram of two rays like that of figure (b) below, but take into account the bending of light rays by refraction at the water surface. Assume that the indices of refraction of the air and the water are 1.00 and 1.33 respectively, and the rays are close to a vertical axis through the bulb, and use the small-angle approximation in which sin e≈tan 0≈ 0.) d₁ (a) Number i Units 0 b Mirror Mirror (b)An Unidentified Flying Object. You and your team spot a strange object hovering over the open ocean in broad daylight. You have nothing to reference in order to estimate its distance, height, or size, but you get the idea to use a concave mirror from a signal light. You disassemble the light, extract the mirror, and point it at the sun. You measure the distance to the sun's image from the center of the mirror to be 3.406 m. You then point the mirror at the object and find that its image forms 3.441 m from the center of the mirror. The angle between the line of sight to the object and the horizontal is 28.5 ° (a) What is the distance between you and the object? (b) What is the height of the object above the ground? (c) If the width of the object's image is 11.8 cm, what is the width of the object? (a) Number 1 (b) Number (c) Number i Units Units Units
- The figure shows a small lightbulb suspended at distance d₁ = 280 cm above the surface of the water in a swimming pool where the water depth is d2 = 220 cm. The bottom of the pool is a large mirror. How far below the mirror surface is the image of the bulb? (Hint: Construct a diagram of two rays like that of figure (b) below, but take into account the bending of light rays by refraction at the water surface. Assume that the indices of refraction of the air and the water are 1.00 and 1.33 respectively, and the rays are close to a vertical axis through the bulb, and use the small-angle approximation in which sin e≈ tan 0≈ 0.) do (a) Number Units 18 b Mirror Mirror (b) >A person swimming underwater on a bright day and looking up at the surface will see a bright circle surrounded by relative darkness as in figure (a) below, a phenomenon known as Snell's window. Use the concept of total internal reflection and the illustration in figure (b) to show that ? = 97.2° for the cone containing Snell's window. (Submit a file with a maximum size of 1 MB.) HINTA tall tree is growing across a river from you. You would like to know the distance between yourself and the tree,as well as its height, but are unable to make the measurements directly. However, by using a mirror to form an image of the tree and then measuring the image distance and the image height, you can calculate the distance to the tree as well as its height. Suppose that this mirror produces an image of the sun, and the image is located 0.8646 m from the mirror. The same mirror is then used to produce an image of the tree. The image of the tree is 0.9468 m from the mirror. (a) How far away is the tree? (b) The image height of the tree has a magnitude of 0.15 m. How tall is the tree?
- The figure shows a small lightbulb suspended at distance d₁ = 280 cm above the surface of the water in a swimming pool where the water depth is d₂ = 220 cm. The bottom of the pool is a large mirror. How far below the mirror surface is the image of the bulb? (Hint: Construct a diagram of two rays like that of figure (b) below, but take into account the bending of light rays by refraction at the water surface. Assume that the indices of refraction of the air and the water are 1.00 and 1.33 respectively, and the rays are close to a vertical axis through the bulb, and use the small-angle approximation in which sin 0≈ tan 0≈ 0.) dq (a) Number Units 0 10 Mirror Mirror (b)A concave cosmetic mirror has a focal length of 26 cmcm . A 3.0 cmcm -long mascara brush is held upright 13 cmcm from the mirror. Use ray tracing to determine the location of its image in cm. Use ray tracing to determine the height of its image in cm. Is the image upright or inverted? Real or virtual?