Answer:
515.5 nm
Explanation:
To find the wavelength (λ) of the laser light we can use the following equation:
<u>Where:</u>
n: is the order of the principal maxima = 1
d: is the width of the groove = 1/N
N: is the number of grooves per length = 5139 grooves/cm
θ: is the angle made by the spectral line → tanθ = D/L
D: is the separation from the wall = 0.488 m
L: is the separation from the grating = 1.78 m
First, we have to find d and θ:
Now, we can calculate the wavelength of the laser light:
Therefore, the wavelength of the laser light is 515.5 nm.
I hope it helps you!
Answer:
d) An object that is speeding up always has a positive acceleration, regardless of the direction it travels.
Explanation:
a ) a) An object that is slowing down while traveling in the negative x-direction always has a positive acceleration.
It has negative acceleration in the negative x-direction.
b) An object that is speeding up while traveling in the negative x-direction always has a positive acceleration.
It has a positive acceleration in the negative x-direction'
c) An object that is slowing down always has a negative acceleration, regardless of the direction it travels.
It has a positive acceleration in opposite direction.
e ) An object that is slowing down always has a positive acceleration, regardless of the direction it travels.
It has a positive acceleration only in opposite direction .
I think the answer is D. permit the wave to travel through it
The angle of the Earth on its axis making the sun to beam on the Northern and Southern Hemispheres differently. When one side is fronting the sun, the other is on the side the darkness, so, when it's Winter in the northern half, it's Summer in the southern half.