Express your answer with the appropriate units. An LCD (liquid crystal display) projector works by illuminating a small LCD display--not unlike a small computer screen--with a very bright light and using a lens to form an image of the display on the viewing screen. A small LCD projector has a 4.00-cm-tall LCD display, and the lens needs to create a 2.40-m-tall image. The screen is 6.00 m from the LCD display. HÀ Value cm S = Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B What focal length does the lens need? Express your answer with the appropriate units. HA f = Value cm Submit Previous Answers Request Answer

Express your answer with the appropriate units. An LCD (liquid crystal display) projector works by illuminating a small LCD display--not unlike a small computer screen--with a very bright light and using a lens to form an image of the display on the viewing screen. A small LCD projector has a 4.00-cm-tall LCD display, and the lens needs to create a 2.40-m-tall image. The screen is 6.00 m from the LCD display. HÀ Value cm S = Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B What focal length does the lens need? Express your answer with the appropriate units. HA f = Value cm Submit Previous Answers Request Answer

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter26: Vision And Optical Instruments

Section: Chapter Questions

Problem 3PE: (a) The print in many books averages 3.50 mm in height. How high is the image at the print on the...

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(a) The print in many books averages 3.50 mm in height. How high is the image at the print on the retina when the book is held 30.0 cm from the eye? (b) Compare the size of the print to the sizes of rods and cones in the fovea and discuss the possible details observable in the letters. (The eye-brain system can perform better because of interconnections and higher order image processing.)
A small telescope has a concave mirror with a 2.00-rn radius of curvature for its objective. Its eyepiece is a 4.00 cm-focal length lens. (a) What is the telescope’s angular magnification? (b) What angle is subtended by a 25,000 km-diameter sunspot? (c) What is the angle of its telescopic image?
A digital camera equipped with an f = 50.0-mm lens uses a CCD sensor of width 8.70 mm and height 14.0 mm. Find the closest distance from the camera to a 1.80-m-tall person if the persons full image is to 6t on the CCD sensor.
A 7.5 binocular produces an angular magnification of —7.50, acting like a telescope. (Mirrors are used to make the image upright.) If the binoculars have objective lenses with a 75.0-cm focal length, what is the focal length of the eyepiece lenses?
(a) A laser vision correction reshaping the cornea of a myopic patient reduces the power of his eye by 9.00 D, with a 5.0 uncertainty in the final correction. What is the range of diopters for spectacle lenses that this person might need after LASIK procedure? (b) Was the person nearsighted or farsighted before the procedure? How do you know?
A digital camera equipped with an f = 50.0-mm lens uses a CCD sensor of width 8.70 mm and height 14.0 mm. Find the closest distance from the camera to a 1.80-m-tall person if the persons full image is to 6t on the CCD sensor.
A camera with a 100 mm-focal length lens is used to photograph the sun. What is the height of the image of the sun on the film, given the sun is 1.40106 km in diameter and is 1.50108km away?
A magnifying glass forms an image 10 cm on the opposite side of the lens from the object, which is 10 cm away. What is the magnification of this lens for a person with a normal near point if their eye 12 cm from the object?
. A person looks at a statue that is 2 m tall. The image on the persons retina is inverted and 0.005 m high. What is the magnification?
A good quality camera “lens” is actually a system of lenses, rather than a single lens, but a side effect is that a reflection from the surface of one lens can bounce around many times within the system, creating artifacts in the photograph. To counteract this problem, one of the lenses in such a system is coated with a thin layer of material (n=1.28) on one side. The index of refraction of the lens glass is 1.68. What is the smallest thickness of the coating that reduces the reflection at 640 nm by destructive interference? (In other words, the coating’s effect is to be optimized for =640 nm .)
A person is having farsightedness vision defect because, а. the eye become too long b. the eye become too short С. the lens of the eye become too strong d. no vision
In fluorescent microscopy Identify the conditions of observation that will give the brightest image: A 63x lens with a digital aperture of 1.4B. 100x lens with a 1.0 digital apertureC.63x lens with a 1.0 digital apertureD.100x lens with a digital aperture of 1.4