Homework Answers
power is inversely proportional to focal length. If power is decreased then the focal length will increase and vice versa.
the formula you have used to solve part-a can be used o justify the answer.
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If the refractive power of this lens was DECREASED, would the
focal length for the lens...
2. A convex lens of focal length 24 cm and refractive index of glass is 1.5....
2. A convex lens of focal length 24 cm and refractive index of glass is 1.5. Find the foca length of this lens if it is totally submerged into water of refractive index 1.33. A far sighted person cannot see objects clearly that are closer to the eye than 73 cm Determine the focal length of contact lenses that will enable this person to read a magazine at a distance of 25 cm. 4.
1. You have a converging lens with a focal length of 1.5 cm and a diverging...
1. You have a converging lens with a focal length of 1.5 cm and a diverging lens with a focal length of 2.5 cm. You also have a binder clip with a height of 1.6 cm. A. Sketch the ray tracing if the binder clip is 4.1 cm from the converging lens. B. Use the thin lens equation to calculate the location and size of the image if the binder clip is 4.1 cm from the converging lens. C. What...
A typical human lens has an index of refraction of 1.430. The lens has a double...
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...
If the cornea were simply a thin lens in air, what would be its focal length?...
If the cornea were simply a thin lens in air, what would be its focal length? Express your answer in millimeters to three significant figures. Measurements on the cornea of a person's eye reveal that the magnitude of the front surface radius of curvature is 7.88 mm, while the magnitude of the rear surface radius of curvature is 7.28 mm (see (Figure 1)), and that the index of refraction of the comea is 1.38 FAXD ? mm Submit Request Answer...
You place a 22-cm focal length convex lens at a distance of 50 cm in front...
You place a 22-cm focal length convex lens at a distance of 50 cm in front of a concave lens with a focal length of -40 cm. Then you place a small lightbulb (2 cm tall) 27 cm in front of the convex lens. Determine the distance from the second lens to the final image Express your answer with the appropriate units s'= it is NOT 20.44 or -20.44 cm
The figure illustrates qualitatively a corrective lens of -2.75 diopters. R 8.46 cm The lens material...
The figure illustrates qualitatively a corrective lens of -2.75 diopters. R 8.46 cm The lens material is CR-39 monomer, with an index of refraction of 1.499. Calculate R, the radius of curvature of the outer surface for the lens. Note: the diopter is a measure of the refractive power of a lens, and equals the reciprocal of the focal length in meters. (Example: for +3 diopters, f=0.333 meters.) -18.54 cm Submit Answer Incorrect. Tries 4/12 Previous Tries
Your camera’s zoom lens has an adjustable focal length ranging from 75 to 150 mm. (a)...
Your camera’s zoom lens has an adjustable focal length ranging from 75 to 150 mm. (a) What is the maximum power of the lens, Pmax, in diopters? b) What is the minimum power of the lens, Pmin, in diopters?
What focal-length lens would you need to place next to a converging lens of focal length...
What focal-length lens would you need to place next to a converging lens of focal length 35 cm to create an effective focal length of 18 cm for the combination?
A double convex lens with a focal length of 45.0 cm is placed 65.0 cm from...
A double convex lens with a focal length of 45.0 cm is placed 65.0 cm from an object. How far from the lens is the image in focus? Enter your answer in cm.
An item is 20 em from a lens with a focal length of +12 em (convex...
An item is 20 em from a lens with a focal length of +12 em (convex lens). How far away must the screen be to produce a focused image, and what is the magnification of the image? Draw a rough picture of where the image is in relation to the object and the lens. 1. An item is 8 cm from a lens with a focal length of +12 cm (convex lens). Where does a focused image form? Can it...
2. A convex lens of focal length 24 cm and refractive index of glass is 1.5. Find the foca length of this lens if it is totally submerged into water of refractive index 1.33. A far sighted person cannot see objects clearly that are closer to the eye than 73 cm Determine the focal length of contact lenses that will enable this person to read a magazine at a distance of 25 cm. 4.
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...
If the cornea were simply a thin lens in air, what would be its focal length? Express your answer in millimeters to three significant figures. Measurements on the cornea of a person's eye reveal that the magnitude of the front surface radius of curvature is 7.88 mm, while the magnitude of the rear surface radius of curvature is 7.28 mm (see (Figure 1)), and that the index of refraction of the comea is 1.38 FAXD ? mm Submit Request Answer...
The figure illustrates qualitatively a corrective lens of -2.75 diopters. R 8.46 cm The lens material is CR-39 monomer, with an index of refraction of 1.499. Calculate R, the radius of curvature of the outer surface for the lens. Note: the diopter is a measure of the refractive power of a lens, and equals the reciprocal of the focal length in meters. (Example: for +3 diopters, f=0.333 meters.) -18.54 cm Submit Answer Incorrect. Tries 4/12 Previous Tries
A double convex lens with a focal length of 45.0 cm is placed 65.0 cm from an object. How far from the lens is the image in focus? Enter your answer in cm.
An item is 20 em from a lens with a focal length of +12 em (convex lens). How far away must the screen be to produce a focused image, and what is the magnification of the image? Draw a rough picture of where the image is in relation to the object and the lens. 1. An item is 8 cm from a lens with a focal length of +12 cm (convex lens). Where does a focused image form? Can it...
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