A forensic scientist examines a hair from a crime scene using a microscope with a 15x objective and a 5x eyepiece. How far is the hair from the goal? Assume L = 160 mm in length.
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- q43 A small object has an angular size of 0.3º. When viewed through a magnifier, it has an angular size of 7º. What is the angular magnification in this case? Enter the numerical part of your answer to one decimal figure.A slide projector has a converging lens whose focal length is 128.00 mm. (a) How far (in meters) from the lens must the screen be located if a slide is placed 129.44 mm from the lens? If the slide measures 24.0 mm (width) x 36.0 mm (height), what are the magnitudes of the (b) width (in mm) and (c) height (in mm) of its image? (a) Number i Units (b) Number i Units (c) Number i UnitsAn individual is nearsighted; his near point is 11.0 cm and his far point is 51.0 cm. (a) What lens power is needed to correct his nearsightedness? 1.96 X The response you submitted has the wrong sign. diopters (b) When the lenses are in use, what is this person's near point? 11 X Your response differs from the correct answer by more than 10%. Double check your calculations. cm
- A microscope has an objective lens with a focal length of 16.22 mm and an eyepiece with a focal length of 9.28 mm. With the length of the barrel set at 35.0 cm, the diameter of a red blood cell's image subtends an angle of 1.43 mrad with the eye. If the final image distance is 35.0 cm from the eyepiece, what is the actual diameter of the red blood cell? Hint: To solve this equation, go back to basics and use the thin-lens equation. umA compound microscope has a distance of 161 mm between the objective lens and the eyepiece. The focal lengths of the objective and the eyepiece are 4.03 mm and 25.9 mm, respectively. Determine the magnitude of the total angular magnification ? of the microscope for a person whose near point is 25.0 cm away.A forensic scientist is using a microscope with a 15× objective and a 5× eyepiece to examine a hair from a crime scene. How far from the objective is the hair? Assume a length L = 160 mm.
- Problem 12: A student wears eyeglasses of power P = -3.75 diopter to correct nearsightedness. The glasses are designed to be worn d = 1.3 cm in front of the eye. Part (a) Input an expression for the far point the student can see without correction, do. Part (b) Numerically, what is the distance in meters?A forensic scientist examines a hair from a crime scene using a microscope with a 15x objective and a 5x eyepiece. How far is the hair from the goal? Assume L = 160 mm in length.During LASIK eye surgery (laser - assisted in situ keratomileusis), the shape of the cornea is modified by vaporizing some of its material. If the surgery is performed to correct for nearsightedness, how does the cornea need to be reshaped?