Slits per cm on diffraction grating

AI Thread Summary
The discussion centers on determining the number of slits per centimeter on a diffraction grating that produces visible light at 650 nm in three orders. Participants emphasize the importance of using the diffraction grating equation, which connects the angles of the beams to the wavelength and slit spacing. There is a recognition that without the length of the grating, calculating slits per cm can be challenging. The solution involves finding the distance between adjacent slits and taking its reciprocal to determine the slits per cm. Overall, the conversation highlights the need for clarity on the relationship between grating parameters and diffraction patterns.
msk172
Messages
22
Reaction score
0

Homework Statement



Light of 650 nm can be seen in three orders in a particular grating. About how many slits per cm does this grating have?

Homework Equations



Yikes.

The Attempt at a Solution



Either this question is ridiculously hard resulting in me not even having a clue where to start, or it is so easy that I don't even deserve to get it right.. haha. If someone could just point me towards the right CONTINENT, I might have a chance.. heh. Thanks in advance.
 
Physics news on Phys.org
I understand that, but without knowing the length of the grating, how could one possible ascertain slits / cm?
 
The equation gives you the distance between adjacent slits. Take the reciprocal of that distance (in cm), and you get the number of slits per cm.
 
Got it. Ugh. Too many hours of looking at this screen. Thanks for your time.
 
You're welcome, no problem.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Problem on Diffraction Grating and Laser Crystallography
Replies
10
Views
2K
Calculating the Number of Lines on a Diffraction Grating
Replies
8
Views
27K
Single-sit vs. Double-slit vs. Diffraction grating
Replies
4
Views
4K
Diffraction Grating Homework: Find the Distance of Bright Fringes
Replies
1
Views
2K
Diffraction grating problem involving Snell's Law
Replies
3
Views
5K
Diffraction Grating Question, Dispersion and Resolving
Replies
2
Views
4K
Diffraction Grating Relationship Question
Replies
1
Views
2K
Optics: dispersive power of diffraction grating
Replies
10
Views
5K
Diffraction grating, distances between maxima
Replies
3
Views
5K
Single slit double slit and diffraction grating
Replies
3
Views
13K

Hot Threads

Recent Insights

Back
Top