A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time th
1 answer:
Answer: D) directed downward.
Explanation:
We know that the constant acceleration of of every-thing is always DIRECT DOWNWARDS because of the to the influence of the gravity of the Earth.
This motion is denoted as free fall motion , where the acceleration due to the gravity is constant .
∴ A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always directed downward.
Hence, the correct answer is D) directed downward..
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Answer:
The angle between the blue beam and the red beam in the acrylic block is
Explanation:
From the question we are told that
The refractive index of the transparent acrylic plastic for blue light is
The wavelength of the blue light is
The refractive index of the transparent acrylic plastic for red light is
The wavelength of the red light is
The incidence angle is
Generally from Snell's law the angle of refraction of the blue light in the acrylic block is mathematically represented as
Where is the refractive index of air which have a value of
So
Generally from Snell's law the angle of refraction of the red light in the acrylic block is mathematically represented as
Where is the refractive index of air which have a value of
So
The angle between the blue beam and the red beam in the acrylic block
substituting values