A typical human lens has an index of refraction of 1.41. The lens has a double convex shape, but its curvature can be varied by the ciliary muscles acting around its rim. At minimum power, the radius of the front of the lens is 10.0 cm, while that of the back is 6.00 mm. At maximum power the radii are 6.00 mm and 5.50 mm, respectively. (The numbers can vary somewhat.) If the lens were in air, (a) what would be the ranges of its focal length and its power (in diopters)? (b) At maximum power, where would the lens form an image of an object 25 cm in front of the front surface of the lens? (c) Would the image fall on the retina of a human eye? The retina is located approximately 2.5 cm from the lens.
A typical human lens has an index of refraction of 1.41. The lens has a double convex shape, but ...
A typical human lens has an index of refraction of 1.430. The lens has a double convex shape, but its curvature can be varied by the ciliary muscles acting around its rim. At minimum power, the radius of the front of the lens is 10.0 mm, whereas that of the back is 6.00 mm. At maximum power, the radii are 6.50 mm and 5.50 mm, respectively. If the lens were in air, what would be the maximum power and associated...
A typical human lens has an index of refraction of 1.430. The lens has a double convex shape, but its curvature can be varied by the ciliary muscles acting around its rim. At minimum power, the radius of the front of the lens is 10.0 mm, whereas that of the back is 6.00 mm. At maximum power, the radii are 6.50mm and 5.5mm, respectively. If the lens were in air: What would be the maximum power and associated focal length...
The crystalline lens of the human eye is a double-convex lens made of material having an index of refraction of 1.44 (although this varies). Its focal length in air is about 8.00 mm , which also varies. We shall assume that the radii of curvature of its two surfaces have the same magnitude. (Note: The results obtained in the parts A, B and C are not strictly accurate, because the lens is embedded in fluids having refractive indexes different from...
The crystalline lens of the human eye is double convex and has a typical range of optical power from 110 diopters to 150 diopters . Part A What is the range of focal lengths the eye can achieve? Enter your answers in millimeters, separated by a comma, to three significant figures. Part B At minimum power, where does it focus the image of a very distant object? Give your answer as the distance, in millimeters, from the crystalline lens of...
Problem 1. A concave-convex lens with index of refraction n = 3/2, radii of curvature R1 = ?3cm and R2 = 1cm is 4cm to the left of a diverging lens having focal length ?2cm. An object is placed to the left of both lenses at a distance 7 cm from the concave-convex lens. (a) Where is the final image formed by this combination of lenses? (b) Is the final image upright or inverted? (c) Is the final image real...
1) A single bi-convex lens (a lens with two convex surfaces) made of fused quartz (index of refraction n = 1.46) has surfaces with radii of curvature r1 = 17.0 cm and r2 = -17.0 cm. What is the focal length of the lens in air? Tries 0/12 2) If an object is placed at p = 36.4 cm from the lens, where is the image? (Use plus sign for a real image, and minus sign for a virtual image.)...
An object placed 20 cm in front of a lens results in an image being formed 24 cm behind the lens. Each surface of the lens is convex (bulging away from the optical plane) with the same radius of curvature, and the index of refraction of the glass composing the lens is Tiens =1.4. What is the radius of curvature of either side of this lens (to the nearest tenth of a cm)? Note, once again, the focal length of...
A lens of thickness t = 21 cm has convex radii of curvature of magnitude R1 = 24.5 cm and R2 = 42 cm. The index of refraction of the lens is n = 1.58. An object “O” is placed 94.5 cm to the left of the lens. Where is I2, the image due to the second surface, relative to the first surface? Answer in units of cm. I have calculated I1 as 120.689376.
The thick lens shown at right is made from glass with index of refraction 1.50. The thick lens has thickness of 6.0 cm and radii of curvature of 8.00 cm and 10.00 cm. (a) Find the focal length of this thick lens in air and the position of its focal points (F and F) and its principal points (H, and H,) with respect to the front and back of the lens respectively. (b) Draw a sketch showing the locations of...
A thin plastic lens with index of refraction n = 1.71 has radii of curvature given by Ri = -11.5 cm and R2 = 35.0 cm. HINT (a) Determine the focal length in cm of the lens. cm (b) Determine whether the lens is converging or diverging. converging ОО diverging Determine the image distances in cm for object distances of infinity, 7.00 cm, and 70.0 cm. (c) infinity cm (d) 7.00 cm cm (e) 70.0 cm cm