Answer:
the third law
Explanation:
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Explanation:
sinces : Momentum = velocity × mass 
then : 30 = 10 × m and m = 30 ÷ 10 = 3 kg
 
        
             
        
        
        
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Answer:
The wavelength of the light is 562.5 nm
Solution:
As per the question:
Order, n = 1
Slit separation, d = 
Distance from the bright fringe, y = 0.18 m
Distance between the screen and the grating, D = 0.8 m 
Now,
We know from the eqn for diffraction:

n = 1
 (1)
            (1)
Also,
For very small angle,  :
:
 ≈
 ≈ 
Using the above value in eqn (1):
