The minimum speed of the particle is the Speed of light in glass is c/μ=2×108m/s.
<h3>Why is the refractive index important?</h3>
The higher the refractive index the slower the light travels, which causes a correspondingly increased change in the direction of the light within the material. What this means for lenses is that a higher refractive index material can bend the light more and allow the profile of the lens to be lower.
Refractive index values are usually determined at standard temperature. A higher temperature means the liquid becomes less dense and less viscous, causing light to travel faster in the medium.
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Distant objects in the universe moving away from Earth because the universe is expanding.
Answer:
which of the cars are speeding up: c
which of the cars or slowing down: a
which of the cars are maintaning a constant speed: b
Explanation:
The mass of the car [m] = 1.2×10^3 kg.
The initial speed of car[u]= 0 m/s
The final speed of car [v]= 20 m/s
We are asked to calculate the force required to increase the speed from 0 to 20 m/s.
The momentum of a substance is defined as product of mass and velocity.
Mathematically momentum p=m×v [Here m is the mass]
From Newton's second law we know that-

[here t is the time]



[ANS]
Hence the correct answer to the question is C.