The sun radiates electromagnetic energy at the rate of 3.9 ×10^26 W. Its radius is 6.96 ×10^8

Name: Problem 48, Chapter 17: A Complete Resource Book in Physics for JEE Main
Uploaded: 2021-09-25T12:47:26-08:00
Duration: 1 min 1 s
Channel: Narayan Hari
Description: The sun radiates electromagnetic energy at the rate of 3.9 ×10^26 W. Its radius is 6.96 ×10^8 m. The intensity of sun light at the solar surface will be (A) 1.4 ×10^4 (B) 2.8 ×10^5 (C) 4.2 ×10^6 (D) 5.6 ×10^7

step 1 As we know that as we know that I surface is equal to p by A. So just putting the value in this

Question

The sun radiates electromagnetic energy at the rate of $3.9 \times 10^{26} \mathrm{~W}$. Its radius is $6.96 \times 10^{8} \mathrm{~m}$. The intensity of sun light at the solar surface will be (A) $1.4 \times 10^{4}$ (B) $2.8 \times 10^{5}$ (C) $4.2 \times 10^{6}$ (D) $5.6 \times 10^{7}$

   The sun radiates electromagnetic energy at the rate of $3.9 \times 10^{26} \mathrm{~W}$. Its radius is $6.96 \times 10^{8} \mathrm{~m}$. The intensity of sun light at the solar surface will be
(A) $1.4 \times 10^{4}$
(B) $2.8 \times 10^{5}$
(C) $4.2 \times 10^{6}$
(D) $5.6 \times 10^{7}$

A Complete Resource Book in Physics for JEE Main

Sanjeev Kumar 1st Edition

Chapter 17, Problem 48

Instant Answer

Solved by Expert Narayan Hari

09/25/2021

Step 1

The formula is given by: \[I = \frac{P}{A}\] Show more…

Show all steps

Thanks for your feedback!

The sun radiates electromagnetic energy at the rate of $3.9 \times 10^{26} \mathrm{~W}$. Its radius is $6.96 \times 10^{8} \mathrm{~m}$. The intensity of sun light at the solar surface will be (A) $1.4 \times 10^{4}$ (B) $2.8 \times 10^{5}$ (C) $4.2 \times 10^{6}$ (D) $5.6 \times 10^{7}$

Play audio

Feedback

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Spherical Surface Area

The surface area of a sphere is determined by the formula 4?r², where r is the radius of the sphere. This geometric concept is essential when distributing a total energy output over a spherical surface, which is a common scenario in astrophysics.

Luminosity

Luminosity is the total energy emitted by an object per unit time. It is an intrinsic property of a radiating source and provides a measure of its overall energy output, independent of distance from the observer.

Radiative Flux

Radiative flux, or intensity, refers to the amount of energy that passes through a unit area per unit time. It is calculated by dividing the total power output (luminosity) by the surface area over which the energy is distributed. This concept is key for understanding brightness and energy distribution in radiating bodies.

Please give Ace some feedback