A grating has 450 lines per millimeter. What is the highest order ...

[yoooooman]

A grating has 450 lines per millimeter. What is the highest order m that contains the entire visible spectrum from 400 nm to 700 nm?
 
  A) m = 2
  B) m = 3
  C) m = 4
  D) m = 5
  E) m = 6

Question 2

The vertical displacement y(x,t) of a horizontal string aligned along the x-axis is given by the equation
 
  y(x,t) = (6.00 mm) cos(3.25 m-1)x - (7.22 s-1)t. What are the (a) wavelength and (b) period of this wave?

[kingfahad97]

Answer to Question 1

B

Answer to Question 2

(a) 1.93 m (b) 0.870 s

[yoooooman]

Wow, this really help

[duy1981999]

Thanks for the timely response, appreciate it