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# Physics of waves (answer fully with showing equations and steps used) Problem 4. A) How is...

Physics of waves (answer fully with showing equations and steps used)

Problem 4. A) How is a good camera (one that be ufocused') able to take clear pictures of objects that are a variety of distances from the camera? B) How is the eye able to place clear images on the retina of objects that are a variety of distances from the eye? C) Could a nearsighted person start a fire by using their glasses to focus the rays of the sun? Justify your answer.

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Answer #1

A) A good camera can vary the focal length of the lens , to focus on the number of objects that are at different distances from the camera .

B) This is because of the converging lens that can focus the image of the objects at different distances on the retina of the eye .

C)   No , he cant start the fire . Because a near sighted person uses a diverging lens , which cant focus the rays of the sun .

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