Answer:
A) E = 3.75 10⁻⁴ J
, B) P = 1.25 10⁻¹² Pa, C) λₙ = 604.48 10⁻⁹ m
= 604 nm, D) f = 3.7 10¹⁴ Hz
, E) E₀ = 2,148 10⁴ N /C, F) B₀ = 7.16 10⁻⁹ T
Explanation:
Let's reduce the magnitudes to the SI system
λ = 810 nm = 810 10⁻⁹ m
P = 250 mW = 250 10⁻³ W = 0.250 W
d = 510 um = 510 10⁻⁶ m
A) The power is defined
P = W / t = E / t
E = P t
E = 0.250 1.50 10⁻³
E = 3.75 10⁻⁴ J
B) The radiation pressure is
P = E / c
P = 3.75 10⁻⁴ / 3 10⁸
P = 1.25 10⁻¹² Pa
C) the speed of light is given by
c = λ f
The frequency does not change when moving from one medium to another, resonant processes, therefore to maintain the speed of light in the material medium we have
v = λₙ f
We divide the two expressions
c / v = λ / λₙ
Let's use
n = c / v
λₙ = λ / n
λ = 810 10⁻⁹ / 1.34
λₙ = 604.48 10⁻⁹ m
λₙ = 604.48 nm
D) the passage of radiation from one medium to another is a resonant type process where the radiation excites the electrons that decay emitting at the same frequency
f = c / λ
f = 3 10⁸/810 10⁻⁹
f = 3.7 10¹⁴ Hz
E) In this part let's use the radiation intensity ratio
I = E₀² /μ₀ c
E₀ = √ I μ₀ c
Intensity is defined
I = P / A
In circle area is
A = π r² = π d² / 4
We replace
E₀ = √ (μ₀ c P 4/πd²)
E₀ = √ (4π 10⁻⁷ 3 10⁸ 0.250 4 /π (510 10⁻⁶)²)
E₀ = √ 4.6136 10⁸
E₀ = 2,148 10⁴ N /C
F) to find the magnetic field let's use that the fields are in phase
c = E₀ / B₀
B₀ = E₀ / c
B₀ = 2,148 10⁴/3 10⁸
B₀ = 7.16 10⁻⁹ T
Answer:
depends on the object, but the sound waves come from the impact of the object hitting the table and the tables thiness
Explanation:
Answer:
The correct option is (d).
Explanation:
- The energy a particle has because of its charge and its position relative to another particle is called thermal energy.
- It is the energy that comes from heat. This is generated by the movement of the particles in an object.
- Thermal energy is the energy an object or system has due to the movement of particles within.
Hence, the correct option is (d).
