Question

Stiind ca de la cea mai apropriata stea din afara Sistemului noatru Solar lumina ar ajunge in 4,3ani in ce unitati de masura considerati ca este potrivit sa se masoare distanta pana la aceasta stea?Ce valoare are aceasta distanta?

Answer 1

Answer:

Petametres; 41 Pm

Explanation:

A measurement should use units that give a number between 0.1 and 1000.

The measure that astronomers use is the light year — the distance that light travels in one year.

In those units, the distance is 4.3 light years.

We can calculate the distance in SI units.

$\text{Time} = \text{4.3 yr} \times \dfrac{\text{365.25 da}}{\text{1 yr}} \times \dfrac{\text{24 h}}{\text{1 da}} \times \dfrac{\text{3600 s}}{\text{1h}} = 1.36 \times 10^{8} \text{ s}\\\\\text{Distance} = 1.36 \times 10^{8} \text{ s} \times \dfrac{2.998 \times 10^{8}\text{ m}}{\text{1 s}} = 4.1 \times 10^{16} \text{ m} = 41 \times 10^{15} \text{ m}$

In SI, we should measure the distance in petametres (1 Pm = 10¹⁵ m)

Thus, the distance to the nearest star is 41 Pm.