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2 years ago

What is the frequency of a wave with a wavelength of 7.88 x 10^(-8) m?

Physics

1 answer:

dedylja [7]2 years ago

4 0

Answer:

f = 23.64 Hz

Explanation:

From the wave equation, the relationship between frequency and wavelength is given by;

f = cλ

Where;

λ is wavelength

c is speed of light with a constant value of 3 × 10^(8) m/s

f is frequency

We are given wavelength of 7.88 x 10^(-8) m

Thus;

f = 7.88 x 10^(-8) × 3 × 10^(8)

f = 23.64 Hz

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Answer:

1.4 m/s

Explanation:

The minimum speed will be when the diver's initial velocity is horizontal.

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aᵧ = 9.8 m/s²

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t = 1.43 s

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2 years ago

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2 years ago

A ball is rolled of a 2.14m table at 8m/s. Find the time of flight for the ball and the horizontal range

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Answer:

0.661 s, 5.29 m

Explanation:

In the y direction:

Δy = 2.14 m

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Δy = v₀ t + ½ at²

(2.14 m) = (0 m/s) t + ½ (9.8 m/s²) t²

t = 0.661 s

In the x direction:

v₀ = 8 m/s

a = 0 m/s²

t = 0.661 s

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2 years ago

Monochromatic light of wavelength λ=136.8μ m is shone at normal incidence through a thin film of thickness t resting atop a full

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Answer:

1.8 × 10⁻⁸ Hm

Explanation:

Given that:

The refractive index of the film = 19

The wavelength of the light = 136.8 μ m

The thickness can be calculated by using the formula shown below as:

$Thickness=\frac {\lambda}{4\times n}$

Where, n is the refractive index of the film

${\lambda}$ is the wavelength

So, thickness is:

$Thickness=\frac {136.8\ \mu\ m}{4\times 19}$

Thickness = 1.8 μ m

Since,

1 μ m = 10⁻⁸ Hm

So,

Thickness = 1.8 × 10⁻⁸ Hm

7 0

2 years ago