Physics, 24.06.2019 15:30 sighgabbie

Aray diagram is shownwhich statement best describes the diagram? the diagram shows refraction, and medium 1 is denser than medium 2. the diagram shows refraction, and medium 1 is less dense than medium 2. the diagram shows reflection, and medium 1 is less dense than medium 2. the diagram shows reflection, and medium 1 is denser than medium 2.

$Aray diagram is shownwhich statement best describes the diagram? the diagram shows refraction, and m$

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Answer from: Crxymia

The diagram shows refraction, and medium 1 is less dense than medium 2.

Explanation:

- Reflection occurs when a light ray hits a surface and bounces back into the same medium

- Refraction occurs when a light ray crosses the interface between two different mediums, changing direction

From the diagram, we clearly see that this is a case of refraction, since the light ray crosses the boundary between two mediums.

The direction of a light ray in refraction is given by Snell's Law:

$n_1 sin \theta_1 = n_2 sin \theta_2$ (1)

where

n1 and n2 are the index of refraction of the two mediums: a higher index of refraction means a higher density for the medium

$\theta_1, \theta_2$ are the angles of the light ray in medium 1 and medium 2, measured with respect to the normal to the interface

We can rewrite eq. (1) as

$\frac{n_1}{n_2}=\frac{sin \theta_2}{sin \theta_1}$

From the diagram, we see that

$\theta_1 \theta_2$

$sin \theta_1 sin \theta_2$

and so

$\frac{sin \theta_2}{sin \theta_1}$

which means

$\frac{n_1}{n_2}$

so, medium 2 is denser than medium 1, and the correct answer is

The diagram shows refraction, and medium 1 is less dense than medium 2.

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

Answer from: Quest

Velocity=total displacement/timefrom house to store is 500 from store to neighbor is 200 therefore total displacement=500+200=700metrestherefore,700metres/910seconds=0.8metres per second

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Aray diagram is shownwhich statement best describes the diagram? the diagram shows refraction, and m...