When you move from place to place, how do you know you moved ?
1 answer:
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Answer:
Newtons law of gravitation is called the universal law of gravitation because it is applicable for all masses at all distances, independent of the medium.
Explanation:
For two masses m1 and m2 placed at a distance d, the gravitational force between them will always be given by: Fg=Gd2m1m2. That's why it is a "universal" law.
Answer:
The angle of the incident ray at the air-glass interface is 62.86°
Explanation:
Given that,
Refractive index of glass =1.60
Angle = 42°
We need to calculate the angle of the incident ray at glass-water interface
Using Snell's law
Where, = refractive index of glass
= refractive index of water
= angle of refraction
Put the value into the formula
We need to calculate the angle of the incident ray at the air-glass interface
Using Snell's law
Where, = refractive index of air
= refractive index of glass
= angle of incident
Put the value into the formula
Hence, The angle of the incident ray at the air-glass interface is 62.86°