Given: Wavelength λ = 410 nm  convert to Meters m = 4.10 x 10⁻⁷ m
Speed of light c = 3 x 10⁸ m/s
Required: Frequency  f = ?
Formula: c = λf 
               f = c/λ
               f = 3 x 10⁸ m/s/4.10 x 10⁻⁷ m
               f = 7.32 x 10¹⁴/s  or 732 Thz (Terahertz)
        
             
        
        
        
        
Whatever phase of the moon Ike sees, he can expect to see 
the same phase of moon again, after 29.53 days later.
        
             
        
        
        
Answer:
The  correct option is  H
Explanation:
From the question we are told that 
     The index of refraction of  coating is   
 
        The  index of refraction of material  is  
    
Generally the condition for constructive for a thin film interference is mathematically represented 
             ![2 *  t  = [ m  + \frac{1}{2}] \frac{\lambda}{n_1 }](https://tex.z-dn.net/?f=2%20%2A%20%20t%20%20%3D%20%5B%20m%20%20%2B%20%5Cfrac%7B1%7D%7B2%7D%5D%20%5Cfrac%7B%5Clambda%7D%7Bn_1%20%7D)
Here  t represents the thickness 
For minimum thickness  m =  0
 So 
            
=>        
 
        
             
        
        
        
In a reaction with a directing vendor of the sum forces towards some object or nothing