Are electric files lines due to an isolated positive point charge emanate radially away from the charge?

When a wave hits a boundary, what determines how much is reflected and refracted?

Dafna1 [17]

Answer:

Angle and speed of wave

Explanation:

The two phenomena involved here are:

- Reflection: reflection occurs when a light wave bounces off the interface between two mediums, returning into the first medium, at a different angle

- Refraction: refraction occurs when a light wave passes through the interface between the two mediums, passing into the second medium, changing direction and speed

The coefficient of reflection tells what is the fraction of the wave that is reflected over the total; it is calculated as

$R=|\frac{n_1 cos \theta_1 - n_2 cos \theta_2}{n_1 cos \theta_1 + n_2 cos \theta_2}|^2$

where

$n_1, n_2$ are the index of refraction of the 1st and 2nd medium

$\theta_1, \theta_2$ are the angle between the ray of light and the normal to the interface in the 1st and 2nd medium

From the formula, we see that the % of wave that is reflected depends on the angle and the index of refraction. Moreover, the index of refraction is related to the speed of the wave by:

$n=\frac{c}{v}$

where c is the speed of light in a vacuum and v the speed of light in the medium; therefore, the correct answer is

Angle and speed of wave

5 0

3 years ago

Two of the angles in a triangle are complementary. The third angle is twice the measure of one of the complementary angles. What

Marrrta [24]

Explanation:

Let the 2 be X and Y.

Z is 3rd angle.

Z=2X

w.k.t Sum of angles in a triangle is 180°

Z+X+Y=180°

2X+90°=180°

2X=90°

=>X=45°

=>Y=90°-45°=45°

=>Z=2X=2(45°)=90°

Hope this helps you.

6 0

3 years ago

shows a map of Olivia's trip to a coffee shop. She gets on her bike at Loomis and then rides south 0.9mi to Broadway. She turns

Andreas93 [3]

The magnitude of the total displacement of her trip is 2.2 miles.

<h3>Total displacement of Olivia's trip</h3>

The magnitude of the total displacement of her trip is calculated as follows;

Total east journey = 0.8 mi + 1.2 mi = 2 mi

Resultant displacement = √(y² + x²)

Resultant displacement = √(0.9² + 2²)

Resultant displacement = 2.2 mi

Thus, the magnitude of the total displacement of her trip is 2.2 miles.

Learn more about displacement here: brainly.com/question/321442

#SPJ1

3 0

2 years ago

Explain why a moving object cannot come to a stop instantly in zero seconds

sineoko [7]

Well because it has momentum and it needs to be slowed down.

7 0

3 years ago

Read 2 more answers

10. The shape of the earth is<br> A taco<br> b. A carrot<br> C. A sphere<br> d. A potato

expeople1 [14]

Answer:

C. A sphere.

Explanation:

I'm 100% sure.

6 0

4 years ago