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melomori [17]
3 years ago
5

A hydrogen electron returns from energy level n = 3 to n = 1 during electron transition. What will the spectral lines emitted by

this electron look like under a spectroscope? dark line spectrum white light continuous spectrum bright line spectrum
Physics
2 answers:
Anni [7]3 years ago
8 0

Answer:

when electron jump from n=3 to n=1 then the photon coming out is of Lyman series. Here Lyman series photon is also known as Ultraviolet range of photon

Explanation:

As per Bohr's theory we know that when electron make transition from higher energy level to lower energy level then it emits photons of different energy range.

Here we know that when electron makes transition from any higher level to n=1 then it is ultraviolet range of photons.

While if electron makes transition from any higher energy range to n= 2 then it is visible range of photons

and for any higher energy level to n=3 then it is infrared range of photon

So here the spectrum received in this case is of ultraviolet range

Lana71 [14]3 years ago
5 0
The answer is D for plato
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When the two surfaces of a thin film are parallel and the light is incident at some angle what fringes are formed? A. Circular B
lord [1]

Answer:

The correct option is;

A. Circular

Explanation:

Some of the light that impinges on the surface are reflected and the rest are transmitted to a different medium

At the surface of the next medium also, some of the light are transmitted while the others are reflected and refracted through the first medium

The speed of light (and hence the wavelength and color) refracted through the thin film is changed as the distance the refracted light travels through the thin film is increased as we move away from the point directly in the front view to some distance as the reflected light path from those distance to the eye is increased due to their inclination giving them a different wavelength which are all equal at a radial distance from the eye hence forming a circular fringes.

8 0
3 years ago
At a maximum level of loudness, the power output of a 75-piece orchestra radiated as sound is 72.0 W. What is the intensity of t
FrozenT [24]

Answer:

<em> The intensity would be 0.01432 W/</em>m^{2}<em></em>

Explanation:

The sound intensity is the power that is transmitted by a sound wave per unit area.

Given that

Power output P of the 75-piece orchestra = 72.0 W

The listener's distance  r = 20.0 m

The intensity of sound waves (I) can be obtained with the expression below;

I = P/A .............. 1

where P is the power

A is the area, in this case, at the distance r the sound is radiated through  a sphere.

A = area of a sphere = 4πr^{2}

putting it into equation 1, the intensity would be;

I = P/ 4πr^{2}

Substituting our values we have;

I = 72.0 W /  4 π 20^{2} m^{2}

I = 0.01432 W/m^{2}

Therefore the intensity would be 0.01432 W/m^{2}

3 0
3 years ago
Which particles in an atom are acted upon by the strong force? A. Electrons and neutrons B. Neutrons and protons O C. Protons an
BARSIC [14]

\large \sf \pmb{B) \: Neutrons \:  and  \: Protons}

  • <em>Neutrons And Protons</em> is a particles in an atom and are acted upon by the strong force.
6 0
3 years ago
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sveticcg [70]

Answer:

A capacitor has plates of area 8.25 * 10 ^ - 5 m ^ 2 . To create a capacitance of 3.35*10^ -10 F , how far apart should the plates be ?

Explanation:

6 0
3 years ago
A string that is restricted at both ends has a length of 1.50 m. what is the wavelength of the string’s fundamental frequency?
lara31 [8.8K]
Since it is restricted at both ends, λ/2 = length of string

λ/2 = 1.5m
λ = 1.5*2 = 3m
6 0
3 years ago
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