The light from the Sun reaches Earth in nearly:

Question

Explain with the help of a labelled ray diagram the formation of final image by an astronomical telescope at infinity. Write the expression for its magnifying power.

Answer 1

We check each option against the actual travel time computed from distance divided by speed.

4 minutes would only be correct if the Sun were about half its actual distance from Earth, so this option does not match reality.
2 minutes is far too short, it does not fit the known Sun-Earth distance of about 150 million km at light speed.
16 minutes is close to double the correct value, roughly what you would get by mistakenly using twice the real distance.
Using $t = d / c$ with $d = 1.5 \times 10^{11}$ m and $c = 3 \times 10^{8}$ m/s gives about 500 seconds, which is close to 8 minutes and 20 seconds.

So the light from the Sun takes nearly 8 minutes to reach Earth, making option A correct.

Answer 2

We check each option against the actual travel time computed from distance divided by speed.

4 minutes would only be correct if the Sun were about half its actual distance from Earth, so this option does not match reality.
2 minutes is far too short, it does not fit the known Sun-Earth distance of about 150 million km at light speed.
16 minutes is close to double the correct value, roughly what you would get by mistakenly using twice the real distance.
Using $t = d / c$ with $d = 1.5 \times 10^{11}$ m and $c = 3 \times 10^{8}$ m/s gives about 500 seconds, which is close to 8 minutes and 20 seconds.

So the light from the Sun takes nearly 8 minutes to reach Earth, making option A correct.

The light from the Sun reaches Earth in nearly:

Show Hint

The Correct Option is A

Solution and Explanation

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