College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

Chapter
Section

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

A camera with a 100 mm focal length lens is used to photograph the sun and mean. What is the height at the image of the sun on the film, given the sun is 1.40 × 10 6 km in diameter and is 1.50 × 10 8 km away?

To determine

The height of image of sun.

Explanation

Given info:

Focal length of camera is 100â€„mm . Diameter of sun is 1.46Ã—106â€„km and distance between sun and earth is 1.50Ã—108â€„km.

Formula used:

Formula for focal length of thin lens is,

â€ƒâ€ƒ1f=1d0+1di

Here,

• f is the focal length.
• d0 is the object distance.
• di is the image distance.

Calculation:

Rearranging the formula,

â€ƒâ€ƒdi=1fâˆ’1d0âˆ’1.... (1)

Formula for magnification is,

â€ƒâ€ƒm=hiho=âˆ’dido

Here,

• m is the magnification.
• hi is the height of the image.
• ho is the height of object.

Rearranging the formula we get,

â€ƒâ€ƒhiho=âˆ’dido

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