1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elena L [17]
3 years ago
15

If the star Sirius emits 23 times more energy than the Sun, why does the Sun appear brighter in the sky?

Physics
1 answer:
Ganezh [65]3 years ago
5 0

Answer:

As b ∝ (L/r²) and

the distance of the sun from the earth is 0.00001581 light years

and

the distance of the Sirius from the earth is 8.6 light years

hence,

the Sun appear brighter in the sky

Explanation:

The brightness (b) is directly proportional to the Luminosity of the star (L) and inversely proportional to the square of the distance between the star and the observer (r).

thus, mathematically,

b ∝ (L/r²)

now,

given

L for sirius is 23 times more than the sun i.e 23L

now,

the distance of the sun from the earth is 0.00001581 light years

and

the distance of the Sirius from the earth is 8.6 light years

thus,

using the the relation between conclude that the value of brightness for the Sirius comes very very low as compared to the value for brightness for the Sun.

hence, the sun appears brighter

You might be interested in
An earth scientist who studies hydrosphere
ipn [44]
Oceanographer? I think that is what it is.
5 0
3 years ago
Why are chemical changes considered “unseen”?
jeka57 [31]
<span>Because they occur at an atomic level, changing the actual structure of the thing.

</span>
7 0
3 years ago
Read 2 more answers
What is the object’s acceleration?
Nat2105 [25]

Answer:

the acceleration of object is 3m/1s

5 0
3 years ago
Hii please help i’ll give brainliest if you give a correct answer please
Diano4ka-milaya [45]

Answer:

A

Explanation:

6 0
2 years ago
what happens to the current across a circuit when the voltage is doubled while the resistance is held back ​
Lynna [10]

Since the current is inversely propotional to its resistance, when the voltage is doubled the current will be one-half

7 0
2 years ago
Read 2 more answers
Other questions:
  • PLZZ ANSWER THE QUESTION ​
    6·1 answer
  • Select all natural hazards that the national weather service measures, predicts, and warns for.
    11·1 answer
  • A cannon fires a shell straight upward; 2.3 s after it is launched, the shell is moving upward with a speed of 20 m/s. Assuming
    7·1 answer
  • Which statements about local and global winds is true
    9·2 answers
  • Normally the rate at which you expend energy
    6·1 answer
  • Queremos diseñar un montacargas que pueda subir con una rapidez de 12 km/h una mas 700 kg hasta 40 m de altura en un minuto. Cal
    7·1 answer
  • studyhero A violin string has a length, from the bridge to the end of the fingerboard, of 50 cm. That section of the string has
    8·1 answer
  • Hello all you people who need points use me to get points your welcome :)
    6·2 answers
  • assuming birdman flies at a speed of 22 m/s how high should birdman fly to hit the bucket if the bucket is placed 92 m from the
    8·1 answer
  • A magnet gets demagnetized when it is heated.​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!