Answer:
The angle of incidence when the reflected ray is perpendicular to the incident ray = 45°
Explanation:
According to Snell's Law,
n₁ sin θ₁ = n₂ sin θ₂
When the angle between the incident ray and reflected ray is 90°, the angle of incidence is θ₁ and the angle of reflection, θ₂ = 90° - θ₁ and the index of refraction in the Snell's Law for both media would be the same, n₁ = n₂ = n
n sin θ₁ = n sin (90° - θ₁)
Note that from trigonometric relations,
Sin (90° - θ₁) = cos θ₁
n sin θ₁ = n cos θ₁
(sin θ₁)/(cos θ₁) = 1
tan θ₁ = 1
θ₁ = arctan 1 = 45°
Hope this Helps!!!
Answer:
The answer is B, velocity.
Explanation:
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<span>Electrons display some properties of waves and while they reside outside of the nucleus, their positions cannot be known with certainty. </span>
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Answer:
Red has the longest wavelength among all the visible colors of light.
Explanation:
Visible light is the only electromagnetic radiations which can be seen by human eye. When white visible light passes through a prism it breaks down into 7 distinctive colors of rainbow.
These are red, orange, yellow, green blue, indigo and violet.
Red has the longest wavelength of around 700 nano meters with violet has the shortest wavelength of 380 nano meters.
