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Why is optical density greater than 1.0 considered inaccurate? What should be done?
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- Problem 5: A student is getting her picture taken by a digital camera. The student is ho = 1.65 m tall and she stands do = 2.25 m in front of the camera lens which has a focal length off=0.047 m. Randomized Variables ho = 1.65 m do = 2.25 m f=0.047 m Part (a) Input an expression for the resulting image distance, d;. a В 0 ( 7 8 9 a do ^^^L 4 5 6 h 1 2 3 k + - 0 t VO BACKSPACE DEL Submit Hint Feedback I give up! Part (b) By evaluating the numerical distance, find out if the image is real or virtual. Part (c) Numerically, what is the magnification of the system? Part (d) Numerically, what is the image height in meters? d₁ = L f i m d g J P HOME END CLEARProblem 4: A person who is nearsighted has a far point of d = 3.9 m. She wears glasses that are designed to sit d = 2.2 cm from her eyes. Randomized Variables do = 3.9 m d = 2.2 cm Part (a) Write an expression for the focal length of the glasses which will allow her to see distant objects clearly. f= α В 0 7 8 9 HOME b d T^^L 4 5 6 g h 3 12 0 k m + - END . S t VO BACKSPACE DEL CLEAR I give up! a do J P Submit Hint Part (b) Numerically, what is the focal length in m? FeedbackProblem 99. A) How is a good single-lens camera (one that can be "focused") able to take clear pictures of objects that are a variety of distances from the camera? B) How is the eye able to place clear images on the retina of objects that are a variety of distances from the eye? C) For a fixed focus camera to take clear pictures, the object distance must satisfy a certain inequality. What is this inequality? D) Why does the nearpoint increase as people age?
- You need to record an image on a flat array of CCDs (charge coupled devices—basically a detector). You have two convex lenses mounted in a tube to which you will also attach the CCD plane. The first lens has a focal length of 15 mm and is positioned 25 mm from the sample to be imaged. The second lens, with a focal length of 10 mm, is closer to the CCDs and is 50mm from the first lens. How far away from the second lens will you mount the CCD plane? You must solve this problem using a good diagram and geometry. It is not permissible to use the lens/mirror equation, except to check your answer. Please show all work, and do not copy from chegg.A CCD camera is equipped with a lens with constant focal - length. As the f - number is decreased, determine whether the following quantities increase, decrease, or remain unchanged. Indicate your answers with I, D, or U. (a) the aperture (b) the depth of field (c) the intensity of light reaching the sensor (d) the appropriate exposure time40.0 psia = 14.7 psia 22.2 psia . 37.7 psia . 50 psia = psig psig psig psig psig
- A camera lens used for taking close-up photographs has a focal length of 24.5 mm. The farthest it can be placed from the film is 33.0 mm. (a) What is the closest object (in mm) that can be photographed? x mm (b) What is the magnification of this closest object? XEstimate the linear separation (in kilometers) of two objects at a distance of 1.4 x 106 km that can just be resolved by an observer on Earth (a) using the naked eye and (b) using a telescope with a 5.4-m diameter mirror. Use the following data: diameter of pupil = 5.0 mm; wavelength of light = 550 nm. (a) Number i Units (b) Number i UnitsOn H % 5 Stock of Data 6 Solution 6. For a converging lens the object is 12 cm from the lens and the image is 12 cm from the lens on the opposite side. What the magnification of the image? Physics-Problem Solving Entries Y Sanity Check Key Idea Stock of Data Solution Accessibility: Good to go Q Search Sanity Check & 7 U F8 * 8 1 8 F9 ( 9 F10 O F11 P O F12 PrtSc OFC
- A certain telescope has an objective mirror with an aperture diameter of 200. mm and a focal length of 2.00x 10 3 mm. It captures the image of a nebula on photographic film at its prime focus with an exposure time of 1.50 min. To produce the same light energy per unit area on the film, what is the required exposure time to photograph the same nebula with a smaller telescope that has an objective with a 60.0-mm diameter and a 900.-mm focal length?A lens system consists of a +4D lens and a +3D lens separated by 10 cm. Find the equivalent focal power and the positions of the principal points. An object 3 cm long is situated 50 cm in front of the first lens. What will be the position and size of the image produced by the combination?A) How far from a 59.0- mm -focal-length lens must an object be placed if its image is to be magnified 3.50× and be real? B)