1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
crimeas [40]
3 years ago
15

A ray of light travels from air to water. Which statement about the angle of incidence, reflection and refraction is true? a. Th

e angle of reflection will always equal the angle of incidence, and the angle of refraction will be less than the angle of incidence. b. The angle of reflection will always equal the angle of incidence, and the angle of refraction will be greater than the angle of incidence. c. The angle of reflection be less than the angle of incidence, and the angle of refraction will be less than the angle of incidence. d. The angle of reflection be less than the angle of incidence, and the angle of refraction will be greater than the angle of incidence.
Physics
2 answers:
jeka57 [31]3 years ago
5 0

The law of reflection states that when a ray of light reflects off a surface, the <em>angle of incidence is equal to the angle of reflection</em>.

In this question, the light ray passes from air to water, an optically denser medium.

Imagine drawing a line to representing the boundary between two mediums. Now imagine drawing a line perpendicular to that boundary line marking where the light ray intersects the boundary line. This second line is called the normal. Whenever a light ray passes into a denser medium with a nonzero angle of incidence, the ray will bend towards the normal, making the <em>angle of refraction smaller than the angle of incidence</em>.

Choice A

erik [133]3 years ago
4 0
The answer is A good luck
You might be interested in
You know that there are 1609 meters in a mile. The number of feet in a mile is 5280. How many centimeters equals one inch
garik1379 [7]
<span>Hello there, and thank you for posting your question here on brainly.

<em><u /></em><span><em><u>Short answer: 2.54</u></em>
</span>

Why?

</span>No explanation needed.

Hope this helped you! ♥
4 0
3 years ago
Physics. I need help​
dezoksy [38]
The correct answer would be 40% plz mark brainliest!
8 0
3 years ago
Physics help please
zhuklara [117]

Answer: 37.981 m/s

Explanation:

This situation is related to projectile motion or parabolic motion, in which the travel of the ball has two components: <u>x-component</u> and <u>y-component.</u> Being their main equations as follows:

<u>x-component: </u>

x=V_{o}cos\theta t   (1)

Where:

x=52 m is the point where the ball strikes ground horizontally

V_{o} is the ball's initial speed

\theta=0 because we are told the ball is thrown horizontally

t is the time since the ball is thrown until it hits the ground

<u>y-component: </u>

y=y_{o}+V_{o}sin\theta t+\frac{gt^{2}}{2}   (2)

Where:

y_{o}=120m  is the initial height of the ball

y=0  is the final height of the ball (when it finally hits the ground)

g=-9.8m/s^{2}  is the acceleration due gravity

Knowing this, let's start by finding t from (2):

<u></u>

0=y_{o}+V_{o}sin(0\°) t+\frac{gt^{2}}{2}   (3)

0=y_{o}+\frac{gt^{2}}{2}  

t=\sqrt{\frac{-2 y_{o}}{g}}   (4)

t=\sqrt{\frac{-2 (120 m)}{-9.8m/s^{2}}}   (5)

t=4.948 s   (6)

Then, we have to substitute (6) in (1):

x=V_{o}cos(0\°) t   (7)

And find V_{o}:

V_{o}=\frac{x}{t}   (8)

V_{o}=\frac{52 m}{4.948 s}   (9)

V_{o}=10.509 m/s   (10)

On the other hand, since we are dealing with constant acceleration (due gravity) we can use the following equation to find the value of the ball's final velocity V:

V=V_{o} + gt (11)

V=10.509 m/s + (-9.8 m/s^{2})(4.948 s) (12)

V=-37.981 m/s (13) This is the ball's final velocity, and the negative sign indicates its direction is downwards.

However, we were asked to find the <u>ball's final speed</u>, which is the module of the ball's final vleocity vector. This module is always positive, hence the speed of the ball just before it strikes the ground is 37.981 m/s (positive).

5 0
2 years ago
1. Why should you use scientific notation when writing big numbers?
Fynjy0 [20]

Answer:

It helps the answer look clean. It also makes the work easier to work with.

Explanation:

Instead of writing a lot of zeros, all you have to do is add exponents to the number to show how much the decimal moved.

6 0
3 years ago
Name three situations in which force is created. describe the cause of the force in each situation
Darina [25.2K]
One situation in which force is created is when an object is moving and a force is created to stop that movement. Second situation is when an object is moving circularly and a force is created to move it towards the middle of the circle. The third situation is when a force is created that goes in the same direction as an object that is in movement.
6 0
3 years ago
Other questions:
  • The 25-lb slender rod has a length of 6 ft. using a collar of negligible mass, its end a is confined to move along the smooth ci
    9·1 answer
  • Most often frequency is measured by the number of waves that pass a point in one blank
    11·1 answer
  • A horse gallops along a racecourse at a speed of 40km/h. It takes the horse 3 minutes to run the length of the track. Convert 3
    7·1 answer
  • If an atom had a nucleus 1 ft in diameter, what would be the diameter of the atom, in miles? (1 mi = 5,280 ft)
    7·1 answer
  • In the video, you saw that models must sometimes be changed. why does that happen?
    5·2 answers
  • Paper craft wall hanging how is it ?​
    14·2 answers
  • Suppose an object’s initial velocity is 10 m/s and its final velocity is 4 m/s. Mass is constant.
    7·1 answer
  • N=-D(n2-n1)/(x2-x1) D is diffastion.What are the dimensions of D.
    7·1 answer
  • Use the following information for question 26 and 27. A 550-g ball traveling at 8.0 m/s undergoes a sudden head-on perfectly ela
    8·1 answer
  • While in Earth's orbit, an 80-kg astronaut carrying a 20-kg tool kit is initially drifting toward a stationary space shuttle at
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!