Question

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.

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 .