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3 years ago

The range of wavelengths for visible light is from 3.9*10^-7m. What is the corresponding range of frequencies for visible light

Physics

1 answer:

IRINA_888 [86]3 years ago

4 0

Answer:

from 7.69×10¹⁵ Hz

Explanation:

Frequency: This can be defined as the number of complete cycle a wave complete in one seconds, the S.I unit of frequency is Hertz (Hz).

From the question,

v = λf............. Equation 1

Where v = speed of visible light in air, λ = wave length of visible light, f = frequency of visible light.

make f the subject of the equation

f = v/λ.................... Equation 2

Note: all electromagnetic wave have the same speed = 3×10⁸ m/s

Given: v = 3×10⁸ m/s, λ = from 3.9×10⁻⁷ m

Substitute into equation 2

f = 3×10⁸/ 3.9×10⁻⁷

f = 7.69×10¹⁵ Hz

Hence the range of the frequencies for visible light = from 7.69×10¹⁵ Hz

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4 years ago

A lever with an output arm of 0.8 meter has a mechanical advantage of 6. What is the length of the input

Novosadov [1.4K]

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input arm- a
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4 years ago

Two astronauts on opposite ends of a spaceship are comparing lunches. One has an apple, the other has an orange. They decide to

german

Answer: v= 1.23 m/s θ = 75.3º

Explanation:

First of all, we define the direction in which both fruits are tossed as the x axis, so all initial momenta have horizontal components only.

Now, if no external forces act during collision (due to the infinitesimal time during which collision takes place) momentum must be conserved.

As momentum is a vector, both components must be conserved, so we can write the following equations:

p₁ₓ = p₂ₓ ⇒ -m₁ . vi₁ +m₂. vi₂ = m₁ . vf₁ . cos θ (1)

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Replacing by the values of m1, m₂, vi₁, vi₂, and vf₂, we can calculate the value of the angle θ, that the apple forms with the horizontal, as follows:

(1) -0.13 Kg. 1.05 m/s + 0.15 Kg. 1.18 m/s = 0.13. vf . cos θ

(2) 0.15 Kg. 1.03 m/s = 0.13 vf. sin θ

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Replacing this value of θ in (2), we get:

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Solving for vf, we get:

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5 0

3 years ago

When the cylinder is displaced slightly along its vertical axis it will oscillate about its equilibrium position with a frequenc

Nesterboy [21]

Answer:

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Explanation:

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w² = mg d / I

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d = L / 2

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ρ = m / V

m = ρ V

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V = π r² L

m = ρ π r² L

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L >> r

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4 years ago

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Answer:

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