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4 years ago

Define the relationship between refraction and reflection

1 answer:

8 0

Reflection and refraction are two different phenomenons. In case of reflection, wave bounces back into the same medium after incident with the interface of two mediums. Reflection will happen if surface is shiny as well as smooth. If surface is irregular, one will get diffused reflection. Refraction means bending of light when waves travel from one medium to another

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A total charge of 9.0 mC passes through a cross-sectional area of a nichrome wire in 3.6s. The number of electrons passing throu

Shtirlitz [24]

Answer:

n = 1.56 x 10¹⁷ electrons

Explanation:

First of all, we will calculate the current passing through wire:

$I = \frac{q}{t}$

where,

I = current = ?

q = charge = 9 mC = 0.009 C

t = time = 3.6 s

Therefore,

$I = \frac{0.009\ C}{3.6\ s}\\\\I = 0.0025\ A = 2.5\ mA$

Now, for the same current in 10 s time the charge will be:

q = It = (0.0025 A)(10 s)

q = 0.025 C

Now, the number of electrons can be given as:

$q = ne\\\\n = \frac{q}{e}\\\\$

where,

n = no. of electrons = ?

q = charge = 0.025 C

e = charge on single electron = 1.6 x 10⁻¹⁹ C

Therefore,

$n = \frac{0.025\ C}{1.6\ x\ 10^{-19}\ C}$

<u>n = 1.56 x 10¹⁷ electrons</u>

8 0

3 years ago

A wind generator, such as the one shown , uses the power of wind to generate electricity What do you think is happening inside t

chubhunter [2.5K]

Answer:

The wind spins blades of a wind turbine around a rotor, which spins a generator, which creates electricity (a generator converts mechanical energy into electricity).

5 0

3 years ago

Volcanic process refers to the eruptive and noneruptive activities that occur on a volcano. Volcanic activities usually

shutvik [7]

I need help too anyone know

5 0

3 years ago

A uniform thin film of material of refractive index 1.40 coats a glass plate of refractive index 1.55. This film has the proper

Alexeev081 [22]

Answer:

31.25 year .

Explanation:

The thickness of layer must change so the destructive interference may be converted into constructive interference . This can happen if thickness is reduced by λ /4 , so that path difference changes by 2 x λ /4 = λ /2 .

This will convert destructive to constructive interference.

change in thickness required = λ /4

= 525 / 4 nm

= 131.25 nm .

year required to wear off

= 131.25 / rate of decay

= 131.25 / 4.2

= 31.25 year .

4 0

3 years ago

A 12.0 V car battery is being used to power the headlights of a car. Each of the two headlights has a power rating of 37.7 Watts

marshall27 [118]

Answer:

3.921*10^19 electrons

Explanation:

To find the number of electron that trough the car battery you first calculate the current by using the following formula, which relates the power with the voltage:

$P=IV$ (1)

P: power of both headlights = 2(37.7W) = 75.4 W

I: current = ?

V: voltage of the battery = 12.0 V

You solve the equation (1) for I:

$I=\frac{P}{V}=\frac{75.4W}{12.0V}=6.283A=6.238\frac{C}{s}$

Next, you use the equivalence 1C = 6.241*10^18 electrons:

$6.238\frac{C}{s}*\frac{6.241*10^{18}\ electrons}{1C}=3.921*10^{19}\ electrons/s$

The number of electrons that cross the battery per second is 3.921*10^19 electrons

6 0

3 years ago