Answer:
The answer to the question is
The luminosity of stars A is four times that of star B
Explanation:
Flux (F) produced by a source of light is directly proportional to the brightness or Luminosity (L), and varies inversely to its distance d, that is 
Therefore if the two stars present the same flux then we have
then crossing out like terms gives 
or 4·L₁ = L₂
The luminosity of star A is 4 times the that of star B
Answer:
<em>The wave is travelling in the ±z-axis direction.</em>
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Explanation:
An electromagnetic wave has an oscillating magnetic and electric field. The electric and magnetic field both oscillate perpendicularly one to the other, and the wave travels perpendicularly to the direction of oscillation of the electric and magnetic field.
In this case, if the magnetic field is in the +x-axis direction, and the electric field is in the +y-axis direction, we can say with all assurance that the wave will be travelling in the ±z-axis direction.
Answer:
pascal is the unit of pressure .
hope it is helpful to you
Hello there..
<span>Which of the following statements is TRUE?
</span>D. Light waves are electromagnetic waves and sound waves are mechanical waves.
