Consider two diffraction gratings. One grating has 3000 lines per cm, and the other one has 6000 lines per cm. Both gratings are illuminated with a beam of the same monochromatic light. Which grating produces the greater dispersion?

Both gratings produce the same dispersion.
The grating with 3000 lines produces the greater dispersion.
The grating with 6000 lines produces the greater dispersion.
The dispersion cannot be determined without additional information.

Question

Consider two diffraction gratings. One grating has 3000 lines per cm, and the other one has 6000 lines per cm. Both gratings are illuminated with a beam of the same monochromatic light. Which grating produces the greater dispersion?

Both gratings produce the same dispersion.
	 The grating with 3000 lines produces the greater dispersion.
	 The grating with 6000 lines produces the greater dispersion.
	 The dispersion cannot be determined without additional information.

anonymous · Answer

@Mashy I dont understand what this is really saying

anonymous · Answer

monochormatic is the same color or one color

anonymous · Answer

wouldnt it be the same then?

anonymous · Answer

mono = one

chroma = color

monochromatic = one color.. 

Dispersion usually means how much the colors are split apart.. 

but in this case, i think .. that dispersion means how much is the light SPREAD across.. so again remember, narrower the slits, closer the slits, more will tbe spreading effect.. 

so whats your answer?

anonymous · Answer

6000 lines has great dispersion ?

anonymous · Answer

Intuitively, yes the 6000 would have greater dispersion.  For the experimental side of this you can look up Young's Double Slit experiment and Bragg's Law for diffraction.

anonymous · Answer

thank you =)

anonymous · Answer

correct!!!

anonymous · Answer

thank you =)

anonymous · Answer

yw :)