BIO Predict/Calculate Diopter Change in Diving Cormorants Double-crested cormorants ( Phalacrocorax auritus) are extraordinary birds—they can focus on objects in the air, just like we can, but they can also focus underwater as they pursue their prey. To do so, they have one of the largest accommodation ranges in nature—that is, they can change the focal length of their eyes by amounts that are greater than is possible in other animals. When a cormorant plunges into the ocean to catch a fish, it can change the refractive power of its eyes by about 45 diopters, as compared to only 16 diopters of change possible in the human eye (a) Should this change of 45 diopters be an increase or a decrease? Explain. (b) If the focal length of the cormorant s eyes is 4.2 mm before it enters the water what is the focal length after the refractive power changes by 45 diopters?
BIO Predict/Calculate Diopter Change in Diving Cormorants Double-crested cormorants ( Phalacrocorax auritus) are extraordinary birds—they can focus on objects in the air, just like we can, but they can also focus underwater as they pursue their prey. To do so, they have one of the largest accommodation ranges in nature—that is, they can change the focal length of their eyes by amounts that are greater than is possible in other animals. When a cormorant plunges into the ocean to catch a fish, it can change the refractive power of its eyes by about 45 diopters, as compared to only 16 diopters of change possible in the human eye (a) Should this change of 45 diopters be an increase or a decrease? Explain. (b) If the focal length of the cormorant s eyes is 4.2 mm before it enters the water what is the focal length after the refractive power changes by 45 diopters?
BIO Predict/Calculate Diopter Change in Diving Cormorants Double-crested cormorants (Phalacrocorax auritus) are extraordinary birds—they can focus on objects in the air, just like we can, but they can also focus underwater as they pursue their prey. To do so, they have one of the largest accommodation ranges in nature—that is, they can change the focal length of their eyes by amounts that are greater than is possible in other animals. When a cormorant plunges into the ocean to catch a fish, it can change the refractive power of its eyes by about 45 diopters, as compared to only 16 diopters of change possible in the human eye (a) Should this change of 45 diopters be an increase or a decrease? Explain. (b) If the focal length of the cormorant s eyes is 4.2 mm before it enters the water what is the focal length after the refractive power changes by 45 diopters?
Example (1): A candle that have length (5 cm) placed in (40 cm) away from a convex
mirror with the radius of its ball (60 cm), find the position of the imagination, amount
of magnification, length and characteristics of the imagination.
Baxter Nachure lives in the country along Sinewave road. It is difficult to pull out of the driveway onto the road since the road is curved and trees prevent him from seeing around the corner. He recently installed a large convex mirror at one of the curves to give him a wider angle of view. It has a focal length of -1.54 meters. Determine the magnification of an oncoming car located 35.8 m from the mirror.
Calculate Combined Power Example 119. A simple microscope.is a combination of two lenses, in contact, of powers +15 D and +5 D.
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