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3 years ago

The light from Barnard's Star takes about 5.94 years to reach Earth. Which of these statements is correct about Barnard's star?

Physics

1 answer:

s344n2d4d5 [400]3 years ago

7 0

Answer:

It is located at a distance of 5.94 light years from Earth.

Explanation:

Since light transmitted from the star takes approximately 5.94 years to reach the earth, it means the star is located at a distance of 5.94 light years from Earth.

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You illuminate a slit with a width of 71.7 μm with a light of wavelength 737 nm and observe the resulting diffraction pattern on

miskamm [114]

To solve this problem we will apply the concepts related to the double slit-experiment. Under this concept we understand the relationship between the minimum angle, depending on the order of the fringes, the wavelength and the distance between slits. Therefore we have the following relation,

$sin(\theta_{min}) = \frac{m\lambda}{D}$

Here,

m = Order of the fringes

D = Distance between slits

$\lambda$ = Wavelength

Replacing with our values we have,

$sin(\theta_{min}) = \frac{(1)(737*10^{-9})}{71.7*10^{-6}m}$

$sin(\theta_{min}) = 0.01028$

Through the relationship between distances then we have that the basic amplification distance is given by the relationship between the distance of the slit L and the angle, then

$Y=Lsin\theta$

$Y =2.27*0.01028$

$Y =0.0233m$

Thus the width of the central maximum is

$W=2Y=2*0.0233$

$W = 0.0466m$

Therefore the widht is 0.466m

6 0

4 years ago

What contributes did Galileo make to the model of the Solar System?

Feliz [49]

Answer:

Galileo first discovered that the Moon had mountains just like Earth. He also discovered 4 of Jupiter's moons. Using his telescope, Galileo made many observations of our Solar System. He came to believe that the idea that the Sun and other planets orbited around the Earth was not correct.

Explanation:

5 0

3 years ago

What is so fragile that just saying its name breaks it?

sertanlavr [38]

Answer: The Sound of Silence.

5 0

2 years ago

For a body falling freely from rest (disregarding air resistance), the distance the body falls varies directly as the square o

My name is Ann [436]

Answer:

The distance is 199.98 ft.

Explanation:

Given that,

Distance = 512 feet

Time = 88 sec

The distance the body falls varies directly as the square of the time.

$s\propto t^2$

$s=kt^2$

We need to calculate the value of constant

Put the value into the formula

$512=k\times(88)^2$

$k=\dfrac{512}{(88)^2}$

$k=0.06611$

We need to calculate the distance

Using formula of distance again

$s=kt^2$

Put the value into the formula

$s=0.06611\times(55)^2$

$s=199.98\ ft$

Hence, The distance is 199.98 ft.

4 0

3 years ago

how mobile phones make use of chemical , lightning and magnatic effects? lease give a simple answer !

Basile [38]

Answer: By a mechanism that is not fully understood, charges in a thundercloud are separated such that the lower portion of a cloud takes on a negative charge while the upper portion is positive. In addition to the negative charge on the base of the cloud, there are small pockets of positive charge on the base.

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3 years ago