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2 years ago

Is a spectral line with wavelength 656 nm seen in the absorption spectrum of hydrogen atoms? why or why not?

Physics

1 answer:

bekas [8.4K]2 years ago

8 0

<u>No</u>, Photons are absorbed in a quantum jump from a lower energy level to a higher energy level.

When an electron moves closer to the nucleus and emits a photon, to move an electron further from the nucleus requires the absorption of a photon.

A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from absorption of light in a narrow frequency range, compared with the nearby frequencies. Spectral lines are often used to identify atoms and molecules.

To learn more about Spectral line, here

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object of mass m=2.6 kg is dropped from rest at a height of h above a massless spring with spring constant k=494.3 N/m that is i

tekilochka [14]

Answer:

3.56 m

Explanation:

As the object falls from height h, and then compresses the spring a distance of 0.66m, its initial potential energy is converted into elastics energy of the spring.

Let g = 9.81m/s2. Knowing that the total change in potential height is h + d, we have the following equation

$E_p = E_s$

$mg(h + d) = kd^2/2$

$2.6*9.81(h + 0.66) = 494.3*0.66^2/2$

$h + 0.66 = 4.22$

$h = 4.22 - 0.66 = 3.56 m$

3 0

3 years ago

The gravity between me (68 kg) and my laptop (0.91 kg)

zepelin [54]

If you mean gravitational force, then it is GMm/r^2, which is G(68)(.91)/ (the distance between you and the laptop), where G is the universal gravitational constant

4 0

3 years ago

What is the angle of deviation in a plane mirror at normal incidence?

Tems11 [23]

Answer:

The deviation of a mirror is equal to twice the angle of incidence.The total angle between the straight-line path and the reflected ray is twice the angle of incidence. This is called the deviation of the light and measures the angle at which the light has strayed from its initial straight-line path.

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7 0

4 years ago

If you have the p (charge per volume) value for a thick charged insulating cylindrical shell how do you find the linear density?

velikii [3]

You can multiply the charge per unit volume by the base area of the cylinder to obtain the linear density.

8 0

4 years ago

Atomic Nucleus: The mass number of an atom is equal to the number of what particles in the nucleus?

egoroff_w [7]

Answer:

Nucleons

Explanation:

MASS NUMBER :

Mass number is denoted by A
Mass number is the sum of number of proton and number of neutron in the atom.
Both proton and neutron are present in the nucleolus pf the atom and are called nucleons
So the mass number of an atom is equal to the number of nucleons
Number of nucleons = number of proton+number of neutron

8 0

3 years ago