Different speeds of light through two separate media ... and the difference in wavelength caused by the difference ... causes the bending of waves fronts associated with light rays. 
AFTER the bend, since the light rays then travel in a different direction, we may also say that the 'velocity' has changed.
 
        
             
        
        
        
Making a wire thicker has the same effect as making a road wider. It makes it easier for the electron traffic to flow. The resistance decreases, and the current (traffic) increases.
        
             
        
        
        
Answer:
 if we measure the change in height of the gas within the had and obtain a straight line in relation to the depth we can conclude that the air complies with Boye's law.
Explanation:
The air in the tube can be considered an ideal gas,
            P V = nR T
In that case we have the tube in the air where the pressure is P1 = P_atm, then we introduce the tube to the water to a depth H
 For pressure the open end of the tube is
          P₂ = P_atm + ρ g H
Let's write the gas equation for the colon
             P₁ V₁ = P₂ V₂
             P_atm V₁ = (P_atm + ρ g H) V₂
              V₂ = V₁    P_atm / (P_atm + ρ g h)
If the air obeys Boyle's law e; volume within the had must decrease due to the increase in pressure, if we measure the change in height of the gas within the had and obtain a straight line in relation to the depth we can conclude that the air complies with Boye's law.
 The main assumption is that the temperature during the experiment does not change
 
        
             
        
        
        
It's total kinetic energy
        
             
        
        
        
<span>A cumulus cloud is puffy and white.
</span><span>Vinegar has a very sour smell.
</span><span>Water boils at 100 degrees Celsius. </span>