The visible spectrum is composed of red, orange,yellow,  green, blue, violet, indigo.
<h3>What is visible spectrum?</h3>
The visible spectrum refers to the portion of the electromagnetic spectrum that can be seen with the eyes. All other portions of the electromagnetic spectrum are invisible.
The question is incomplete as the details are missing. The visible spectrum is composed of red, orange,yellow,  green, blue, violet, indigo.
Learn more about the visble spectrum: brainly.com/question/1596783
 
        
             
        
        
        
It doesn't mean that the climate is changing, it is probably just the morning dew.
        
             
        
        
        
Answer:
2.2 µm
Explanation:
For constructive interference, the expression is:
 
Where, m = 1, 2, .....
d is the distance between the slits.
Given wavelength = 597 nm
Angle,  = 15.8°
  = 15.8°
First bright fringe means , m = 1
So, 
 
 
 
Also, 
1 nm = 10⁻⁹ m
1 µm = 10⁻⁶ m
So, 
1 nm = 10⁻³ nm
Thus,
<u>Distance between slits ≅ 2.2 µm</u>
 
        
                    
             
        
        
        
Well, if the salt that Gerry's looking at under a powerful microscope has a crystalline structure, then that's saying that salt is technically a solid. 
(I hope that this is an answer you were looking for)