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4 years ago

How can an electron in an atom lose energy to go from a higher energy level to a lower energy level?

Physics

1 answer:

Black_prince [1.1K]4 years ago

3 0

Answer:

when a photon is created by an electron in a higher energy level. The electron looses energy and move to a lower energy level.

Explanation:

energy levels refer to various levels of energy possessed by the electrons in an atom. An electron in a higher energy level possesses more energy and more speed that that in a lower energy level. Electrons can move from one energy level to another when they gain energy from the surroundings or loose energy to the surroundings. They leave their energy level to fit into a new level where the energy level is same with the energy they now possess. Electrons hit by a photon tend to move to higher energy levels. But if an electron creates a photon it drops to a lower energy level

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A typical 100-watt light bulb consumes 100 j of energy per second. If a light bulb converts all of this energy to 400 nm light

VladimirAG [237]

The missing question is: how many photons are produced per second?

Answer:

$2.0\cdot 10^{20}$

Explanation:

The energy of a photon is given by

$E_1 = \frac{hc}{\lambda}$

where

h is the Planck constant

c is the speed of light

$\lambda$ is the wavelength of the photon

In this problem, the photons have wavelength

$\lambda = 400 nm = 400 \cdot 10^{-9} m$ , so each photon has an energy of

$E_1 = \frac{(6.63\cdot 10^{-34})(3\cdot 10^8)}{400\cdot 10^{-9}}=4.97\cdot 10^{-19} J$

The total energy emitted by the bulb in 1 second is

E = 100 J

Therefore, the number of photons emitted per second is

$n=\frac{E}{E_1}=\frac{100}{4.97\cdot 10^{-19}}=2.0\cdot 10^{20}$

3 0

4 years ago

Explain two reasons why sea ice so important to a polar bear.

Zolol [24]

This loss of stable old ice has set up additional losses of sea ice cover each summer because the thinner younger ice is more easily melted during the recent warmer summers. Because of their dependence upon the sea ice for food, these changes can directly affect the carrying capacity of the Arctic for polar bears. Mark this as the brainliest answer please

6 0

3 years ago

Light is polarized by using:

maxonik [38]

Answer:

Polaroid fliter

Explanation:

light can be polarized by using Polaroid filters

Polaroid fliter are made of special material that is capable of blocking one of the two planes of vibration of an electromagnetic wave

hope this is useful--(have a good day)

8 0

3 years ago

The frequency of a microwave signal is 9.76 ghz. what is its wavelength? (c = 3.00 × 108 m/s)

dolphi86 [110]

The basic relationship between frequency of an electromagnetic wave and wavelength of the wave is
$c = \lambda f$
where $c=3 \cdot 10^8 m/s$ is the speed of light.

Manipulating the equation, we can rewrite it as
$\lambda = \frac{c}{f}$

The frequency of the wave in our problem is
$9.76 GHz = 9.76 \cdot 10^9 Hz$
so if we use the previous formula, we find the correspondant wavelength:
$\lambda = \frac{3 \cdot 10^8 m/s}{9.76 \cdot 10^9 Hz} =0.031 m$

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3 years ago

Moving 4.0 coulombs of charge through a circuit

Galina-37 [17]

We know that V=E/Q Where V is the PD, E is the energy, and Q is the charge.

Substituting in the values gives V=48/4=12

Therefore the PD across the circuit is 12V

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4 years ago