Answer:
a) w / k = c
, b) λ = 1,887 10⁻¹ m
, = 4.42 10⁻⁴ J / m³
Explanation:
a) Maxwell's equations when solved for an electromagnetic wave result in
E = E₀ cos (kx - wt)
B = B₀ cos (kx -wt)
Where k is the vector ce wave and w the angular velocity
k = 2π / λ
w = 2π f
Let's divide the two equations
w / k = f λ
w / k = c
Therefore, for w and k to be a solution to Maxwell's equations, their relationship must be equal to the speed of light.
b) If w = 10¹⁰ s⁻¹
w = 2π f
f = w / 2π
f = 10¹⁰ / 2π
f = 1.59 10⁹ Hz
The speed of light is
c = λ f
λ = c / f
λ = 3 10⁸ / 1.59 10⁹
λ = 1,887 10⁻¹ m
Energy density is
= ½ ε₀ E₀²
= ½ 8.85 10⁻¹² (10 10³)²
= 4.42 10⁻⁴ J / m³
Power is energy per unit of time
P = / t
We calculate for every second
P = 4.42 10⁻⁴ W / m³
The flow or intensity of energy is
I = S = c u
I = 3. 108 4.42 10⁻⁴
I = 1.33 10⁵ W / m2
Explanation:
If there is no no pictures how I will describe???????????
Answer:
Correct answer: The fourth claim
Explanation:
No claim is most accurate but if you have to choose the best from the bad one, it's fourth - Its height decreased as its motion increased.
The potential energy depends from height Ep = m g h and kinetic
energy depends besides mass from velocity (motion) Ek = m v²/ 2
God is with you!!!
D. Advances in technology were needed to gather more evidence.
Explanation:
New technologies had to be developed to ascertain Wegener's claims.
The major flaw in Wegener's postulate was that the moving continents lacked a mechanism to drive them into motion.
His theory needed more scientific backing also.
- A major leap was made when new technologies used during the second world war was deployed to investigate the ocean floor.
- Sequences of magnetic anomalies were unraveled using equipment developed during the second world war
- This gave further proof to the idea of continental drift and it expanded the theory into a more broader and inclusive theory of plate tectonics.
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Wegener brainly.com/question/5002949
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Answer:
Explanation:
= Intensity of unpolarized light =
= Angle of the filter =
Intensity of light is given by
The intensity of light detected by the camera is