Deep-space navigation systems record the separation between our solar system and the Alpha… — Armed Services Vocational Aptitude Battery (ASVAB)

Deep-space navigation systems record the separation between our solar system and the Alpha Centauri star system as $4.37$ light-years. Which statement correctly identifies what this unit of measurement describes?

A
The duration of $4.37$ years required for an exoplanet to complete one full orbit around its host star
B
The velocity at which electromagnetic signals propagate through interstellar vacuum
The physical span traversed by radiation in $4.37$ standard Earth yearsCevap
D
The estimated remaining lifespan of a stellar core before entering the red giant phase

Cevap

The physical span traversed by radiation in

4.37

standard Earth years

In astronomy, a light-year is defined as the distance that electromagnetic radiation (light) travels through a vacuum in one Julian year. Therefore, a separation of

4.37

light-years indicates the total physical length traversed by light over

4.37

Earth years.

Adım Adım Çözüm

Identify the physical dimension defined by the astronomical unit 'light-year'

A light-year is a unit of length (distance), not a measure of time or speed.

Because distances between stars are vast, astronomers quantify space intervals using the distance light travels in one Earth year (

~9.46 \times 10^{12}\text{ km}

Apply the definition to a value of

4.37

light-years

The value represents the distance covered by electromagnetic waves traveling at speed

c

over an interval of

4.37

years.

Multiplying the constant speed of light by the specified number of years yields the physical distance separating the two star systems.

Anahtar Kavram

Definition of the light-year as an astronomical unit of distance

Tahmini Süre:1m 0s

Soru

Cevap

Adım Adım Çözüm

Anahtar Kavram

Sık Yapılan Hatalar

Konular

Bu konudan daha fazla soru