A magnifying glass uses a convex lens with a refractive power of 20 diopters. What is the angular magnification if the image is to be viewed by a relaxed eye with a near point of 25 cm?

A) 5.0
B) 3.0
C) 4.0
D) 1.0
E) 2.0


A

Physics & Space Science

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The study of planet Earth is known as

a. mineralogy. b. petrology. c. geology. d. paleontology.

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The world's largest refracting telescope is operated at the Yerkes Observatory in Wisconsin. It has an objective of diameter of 1.02 m

Suppose such an instrument could be mounted on a spy satellite at an elevation of 300. km above the surface of the Earth. What is the minimum separation of two objects on the ground if their images are to be clearly resolved by this lens? (Assume an average wavelength of 0.55 ?m for white light.)

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A total solar eclipse will only occur when the new moon is both on the ecliptic and at its greatest distance from Earth

Indicate whether the statement is true or false

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