Answer:
There is a dependency relationship between the refractive index of each substance and the radiation wavelength.
The refractive index in a given medium is inversely proportional to the wavelength of a color.
For example:
The rays of the red color have a wavelength greater than the rays of the blue color, therefore they have a lower refractive index and consequently a light scattering less than the blue.
Snell's law :
n₂/n₁ = v₁/v₂ = λ₁ /λ₂
*n: (refractive index)
v: (speed of light propagation)
λ: (wavelength)
<h3>Hi!</h3>
The correct answer is B.
<h3>Explanation</h3>
Astronomers use both apparent magnitude and absolute magnitude to define how bright a star is. By way of apparent magnitude, astronomers gauge how bright the star seems from the Earth, and b way of absolute magnitude, astronomers gauge how bright the star seems from 10 parsecs/32.6 light years which is a set standard distance.
<h3>Hope this helps</h3>
What are the given choices?
Answer:
a.)
b.)
Explanation:
<u>Electric Field and Potential Difference</u>
There are several conditions that must be met for a spark to be created into an air gap. Once the physical conditions are fixed, a minimum electric field is necessary for the spark to be initiated. Let s be the separation between the electrodes and V their potential difference. The electric field is
a.)
Solving for V
The separation is
Thus the potential difference is
b.) If the separation was greater, the applied voltage needs to be greater if the electric field has to be constant. One possible measure to keep electrodes as close as possible is to build them as sharp edges. It gives the spark an easier path to travel to.
If the separation is 0.05 inches =0.00127 m
Initial velocity(u)= 50m/s. t=2s. a= -9.8m/s². ( minus because acceleration is in downward direction). v=u+at. v= 50 - 9.8×2. v= 30.4m/s.