We have an answer to "The sun is 150,000,000 km from earth; its..."

College
Physics
Advanced Physics

Zachery Mckee

Answered question

2022-11-24

The sun is 150,000,000 km from earth; its diameter is 1,400,000 km. A student uses a 4.6-cm-diameter lens with f = 10 cm to cast an image of the sun on a piece of paper. What is the diameter of the image on the paper?

Answer & Explanation

Lilly Parrish

Beginner2022-11-25Added 6 answers

the image distance

1 / v = 1 / - 1 / u

Where
u= Object distance

= 15 \times 10^{7} k m

Diameter = 1400000 km
Diameter of lens = 4.6 cm
f= Focal length

(10 c m) = 1 \times 10^{- 4}

We can substitute to the above formula we have

1 / 15 \times 10^{7} k m + 1 / 1 \times 10^{- 4} V = 0.001 k m

Therefore, paper stayed on the focus, hence the sharp image

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