What is a wave? Use the terms wavelength and frequency in your definition.

Physics

1 answer:

adelina 88 [10]3 years ago

8 0

Explanation:

A wave is a disturbance in a medium. For example, when some pebbles are thrown in water, the water particles gets disturbed. A wave is characterized by the following parameters i.e.

Frequency

Wavelength etc

The number of oscillations or vibrations in a medium is called the frequency of a wave.

Also, the distance between two consecutive crests and troughs is called the wavelength of a wave. The relationship between the wavelength and the frequency of a wave is given by :

Speed of wave = frequency × wavelength

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4vir4ik [10]

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3 years ago

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A red photon has a wavelength of 650 nm. An ultraviolet photon has a wavelength of 250 nm. The energy of an ultraviolet photon i

zimovet [89]

The energy of an ultraviolet photon is 2.6 times greater than a red photon.

<h3>Energy of a photon</h3>

The energy of a given photon of light is calculated using the wavelength and the speed of light.

<h3>Energy of a red photon</h3>

The energy of the a red photon at the given wavelength is calculated as follows;

$E_r = \frac{hc}{\lambda} \\\\E_r = \frac{6.67 \times 10^{-34} \times 3 \times 10^8}{650 \times 10^{-9}} \\\\E_r = 3.078 \times 10^{-19} \ J$

<h3>Energy of an ultraviolet photon</h3>

$E_r = \frac{hc}{\lambda} \\\\E_r = \frac{6.67 \times 10^{-34} \times 3 \times 10^8}{250 \times 10^{-9}} \\\\E_r = 8.0 \times 10^{-19} \ J$

<h3>The ratio of the two energies</h3>

$= \frac{8.0 \times 10^{-19}}{3.078 \times 10^{-19}} \\\\= 2.6$

Thus, the energy of an ultraviolet photon is 2.6 times greater than a red photon.

Learn more about energy of a photon here: brainly.com/question/7464909

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3 years ago

What produces the wavy effect in air over a hot stove

AysviL [449]

<span>The reason that things look wavy in the heat over a hot grill or stove is that the air temperature is not stable. Hot air naturally rises, so as air comes off the hot surface, it rises for a bit before rapidly cooling and sinking to be heated again. This constant mixing of hot and cool air produces vibration. This vibration affects how we see the light moving through the air, making it look wavy.</span>

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3 years ago

The thermal conductivity of a cement is 0.168 British thermal units per foot hour degree Fahrenheit [BTU divided by (ft h Super

Sliva [168]

Answer:

thermal conductivity = 0.2906 W/m.K

Explanation:

thermal conductivity = 0.168 BTU/h.ft⁰F

1 BTU/h.ft⁰F = 1.7295772056 W/m.k

0.168 BTU/h.ft⁰F = 0.168 * 1.7295772056 W/m.k

0.168 BTU/h.ft⁰F = 0.2906 W/m.k

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