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* Resolving sunspots You are looking at sunspots. They usually appear in pairs on the surface of the Sun. The Sun is about
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- Endoscopes are medical instruments used to examine the gastrointestinal tract and other cavities inside the body. The light required for examination is conducted from an outside source along a long, flexible bundle of optical fibers to the tip, where it exits and illuminates the internal cavity. A lens on the lip collects an image of the lighted cavity and another fiber bundle conducts the image back along the endoscope to an eyepiece for viewing (Fig. P22.52). If each fiber in the bundle has diameter d = 1.00 104 m and refractive index n = 1.40, find the smallest outside radius R permitted for a bend in the fiber if no light is to escape. Figure P22.52arrow_forwardAn amateur astronomer looks at the moon through a telescope with a 15-cm-diameter objective. What is the minimum separation between two objects on the moon that she can resolve with this telescope? Assume her eye is most sensitive to light with a wavelength of 550 nm.A. 120 m B. 1.7 km C. 26 km D. 520 kmarrow_forwardYou want a telescope that discern objects that are at least 3.10 x 107 radians apart. A.) To achieve this resolution, determine what wavelength should be used if the diameter of the primary mirror is 0.8 m. MY NOTES ASK YOUR TEACHER B.) A binary star system (two stars in orbit about each other) is 16.9 ly away. The two stars would just barely be able to be discerned by your telescope. Determine the minimum distance between the stars. 1 ly = 9.461 x 10¹5 m.arrow_forward
- Stars twinkle because: A. the intensity of light emitted by them changes with time B. the distance of the stars from the earth changes with time C. the refractive index of the different layers of the earth's atmosphere changes continuously, consequently the position of the image of a start changes with time D. the light from the star is scattered by the dust particles and air molecules in the earth's atmospherearrow_forward1. The figure below shows a slab made of three different materials X, Y and Z having refractive indices nx, ny, and nz respectively. The slab is immersed in water (n=1.333) and the light is incident upon its bottom surface. a. Rank the materials according to the refractive index of the materials, greatest first. b. Rank the materials according to the speed of light in the material, greatest/fastest first. c. Discuss what would happen to the angle if material X and Y are swapped. d. If a=80.0° and θ=60.0° , what is the refractive index of material Z?arrow_forwardQUESTION 4 How would you produce coherent light from an ordinary incandescent light bulb? O A. By using a spectral filter, a pinhole and a spectral (color) filter respectively. O B. By using a spectral (color) filter, spectral filter and a telescope respectively. O c. By using a spectral filter, telescope and spectral (color) filter respectively. O D. By using a spatial filter, a pinhole and a spectral (color) filter respectively.arrow_forward
- *Problem 3: Consider a microscope that uses ultraviolet light of frequency f = 1.25 × 10 15 Hz Ignoring the details of the optical system, what is the approximate size d, in meters, of the smallest feature observable through this microscope?arrow_forwardA photographer is attempting to take a photo of two ships on the horizon which are separated by a distance L = 1.3 m. The camera has an aperture of D = 1.2 cm. Assume the range of visible light is 400 nm - 700 nm. A. Find the minimum angle of resolution in degrees. B. What is the maximum distance, in meters, that the ships can be from the photographer to get a resolvable picture?arrow_forwardThe lens of your eye changes to focus on objects at different distances; your eye’s pupil changes to adapt to different light levels. This causes changes in your vision as well. Suppose you are in a dark movie theater, with your pupils fully dilated to 8.0 mm in diameter. Now you emerge into the bright daylight, and your pupils quickly contract to 2.0 mm in diameter. When your pupil contracts, how does this affect the angular resolution of your eye?A. The resolution increases.B. The resolution does not change.C. The resolution decreases.arrow_forward
- QUESTION 2 Which of the following parts of the eye contains the photoreceptor cells commonly called the "rod" and "cones"? a. The optic nerve b. The fovea O c. The vitreous humour O d. The cornea e. The lens QUESTION 3 The time-averaged intensity of sunlight that is incident at the upper atmosphere of the earth is 1,380 watts/m². What is the maximum value of the electric field at this location? O a. 1,200 N/C b. 1,020 N/C C. 1,950 watts/m² d. 660 N/C O e. 840 N/Carrow_forward1. The refractive index of material A is greater than the refractive index of material B. A ray of light is incident on the interface between these two materials in a number of ways, as the drawings illustrate. The dashed lines denote the normals to the interfaces. Which one of the drawings shows a situation that is not possible? Explain your chosen answer. +++ # B Drawing 1 Drawing 2 Drawing 3arrow_forwardIn the macroscopic world, you know that you can hear but cannot see around corners. Under what conditions does light bend around corners (i.e. diffract) ? Explain why sound diffracts easily around a classroom door.arrow_forward
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