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Katena32 [7]
3 years ago
14

How are the energy of infrared, visible light and ultraviolet rays related? And why?

Physics
2 answers:
Aliun [14]3 years ago
5 0
Infrared contains the least energy and ultraviolet contains the most energy. The energy of a wave is inversely proportional to its
DedPeter [7]3 years ago
4 0

Answer: The correct answer is Option C.

Explanation:

Energy of the Electromagnetic Spectrum is given by the Planck's equation:

E=h\nu

Where,

E = Energy of the wave

h = Planck's constant

\nu = Frequency of the wave

And we know that,

\nu=\frac{c}{\lambda}

where,

c = Speed of light

\lambda = Wavelength of the wave

Putting the value of frequency in energy equation, we get:

E=\frac{hc}{\lambda}

From the above relation, we get that energy is inversely related to wavelength of the wave.

From the spectra, we know that order of wavelength follows:

Infrared > Visible > UV

So, the order of energy gets reversed and the order becomes:

Infrared < Visible < UV

From the above information, we conclude that the correct option is Option C.


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Read 2 more answers
A man weighs himself twice in an elevator. When the elevator is at rest, he weighs 824 N; when the elevator starts moving upward
kifflom [539]

Answer: c. 1.3 m/s^2

Explanation:

When he is at rest, is weight can be calculated as:

W = g*m

where:

m = mass of the man

g = gravitational acceleration = 9.8m/s^2

We know that at rest his weight is W = 824N, then we have:

824N = m*9.8m/s^2

824N/(9.8m/s^2) = m = 84.1 kg

Now, when the elevators moves up with an acceleration a, the acceleration that the man inside fells down is g + a.

Then the new weight is calculated as:

W = m*(g + a)

and we know that in this case:

W = 932N

g = 9.8m/s^2

m = 84.1 kg

Then we can find the value of a if we solve:

932N = 84.1kg*(9.8m/s^2 + a)

932N/84.1kg = 11.1 m/s^2 = 9.8m/s^2 + a

11.1 m/s^2 - 9.8m/s^2 = a = 1.3 m/s^2

The correct option is C

3 0
3 years ago
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