Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • The sun (diameter D) subtends an angle of radians at the pole of a concave mirror of focal length <img alt="\math

The sun (diameter D) subtends an angle of \theta radians at the pole of a concave mirror of focal length \mathrm{f}.The diameter of the image of the sun formed by the mirror is

Option: 1

f \theta


Option: 2

\frac{f 2 \theta}{D}


Option: 3

2 \mathrm{f} \theta


Option: 4

\mathrm{D} \theta


Answers (1)

best_answer

Since the sun is at very large distance,
\mathrm{p=\infty}
\mathrm{\Rightarrow \quad \frac{1}{\infty}+\frac{1}{q}=\frac{1}{f}}
\mathrm{\Rightarrow \quad \mathrm{g}=\mathrm{f}}
If the diameter of the image be


\mathrm{\frac{d / 2}{q}=\alpha \quad \Rightarrow \quad d=(2 \alpha) q}
\mathrm{Putting \, 2 \alpha=\theta \: and \, q=f}
\mathrm{we\: obtain \: \quad D=f \theta}


 

 




 

Posted by

Rakesh

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NEET UG 2025 preparation tips; expert advice on time management, know exam pattern
anam-khan

NEET UG 2025 will also apply to BDS, BVSc and AH admissions, clarifies NTA
anam-khan

Boost NEET UG 2025 score with biology preparation tips; high-weightage topics, expert advice

Latest Question