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2 years ago

What is happens when a beam of light is traveling through air and is reflected by a glass surface?

1 answer:

7 0

When a beam of light is traveling through air and is reflected by a glass surface, then the 2R / (1+R) is the total reflectance through a glass window.

To find the answer, we have to know about reflection.

<h3>What is reflection by glass surface?</h3>

Depending on the angle of incidence, the refractive indices of the glass and the light's source, some light is reflected when it strikes a glass surface (e.g., air).
The Fresnel equations can be used to calculate the percentage of transmitted and reflected light.
Both the front and the rear of glass reflect the light that is traveling through it. In fact, the light may mirror itself several times. Therefore, 2R / (1+R) is the total reflectance through a glass window.
These equations predict that ordinary soda-lime window glass will reflect around 8% of the light, assuming a perpendicular incidence angle and no absorption or scattering.

Thus, we can conclude that, when a beam of light is traveling through air and is reflected by a glass surface, then the 2R / (1+R) is the total reflectance through a glass window.

Learn more about the reflection here:

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Middle C also known as "do" on the fixed do-solfege scale, is a note used when playing or singing music. The frequency of middle

saveliy_v [14]

Answer:

198.2m/s

Explanation:

Speed of a wave(v) is the product of the frequency of the wave (f) and its wavelength(¶).

Mathematically, v = f/¶

Given frequency of the middle C = 261.63Hz

Wavelength = 131.87cm

Converting this to meters we have;

131.87/100 = 1.32m

Speed of the sound = 261.63/1.32

Speed of the sound = 198.20m/s

Therefore the speed of sound for middle C is 198.2m/s

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4 years ago

A flask that weighs 345.8 g is filled with 225 mL of carbon tetrachloride.

Vsevolod [243]

Answer:

1.59 g/mL

Explanation:

Mass of CCl₄ = mass of flask and CCl₄ − mass of empty flask

m = 703.55 g − 345.8 g

m = 357.75 g

Density = mass / volume

d = 357.75 g / 225 mL

d = 1.59 g/mL

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3 years ago

Which type of mirror would you use to cook a hot dog and why?

alexandr1967 [171]

As long as it’s a good mirror then any one of them is fine bc at the end of the day i’m getting a hot dog

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3 years ago

A hot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0

iren [92.7K]

Answer:

Y = 40.94m

Explanation:

The initial speed of the sandbag is the same as the balloon and so is its position, so:

$Y = Yo + Vo*t-\frac{g*t^2}{2}$

Replacing these values:

Yo = 40m Vo = 5m/s g = 9.81m/s^2 t = 0.25s

We get the position of the sandbag:

$Y = 40+5*(0.25)-\frac{9.81*(0.25)^2}{2}$

Y = 40.94m

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3 years ago

If you wished to warm 100 kg of water by 15 degrees celsius for your bath, how much heat would be required? (give your answer in

Anit [1.1K]

For the answer to the question above,
Q = amount of heat (kJ) 
cp = specific heat capacity (kJ/kg.K) = 4.187 kJ/kgK 
m = mass (kg) 
dT = temperature difference between hot and cold side (K). Note: dt in °C = dt in Kelvin 

Q = 100kg * (4.187 kJ/kgK) * 15 K 
Q = 6,280.5 KJ = 6,280,500 J = 1,501,075.5 cal

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3 years ago