What is the approximate wavelength of a light whose second-order dark band forms a diffraction angle of 15. 0° when it passes through a diffraction grating that has 250. 0 lines per mm?.

i think they are all correct

explanation:

they seem good

c) up is the direction the magnetic force is acting on the charge.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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