All categories

3 years ago

the speed of light in a piece of plastic is 2.00x10^8 meters per second what is the absolute index of refraction of this plastic

1 answer:

6 0

The speed of light in a material with refractive index n is modified according to the following law:
$v= \frac{c}{n}$
where c is the speed of light in vacuum ( $c=3\cdot 10^8 m/s$ ), while v is the speed of light in the medium ( $v=2 \cdot 10^8 m/s$ ). Re-arranging, we can find the refractive index of this plastic:
$n= \frac{c}{v}= \frac{3 \cdot 10^8 m/s}{2 \cdot 10^8 m/s}=1.5$

You might be interested in

What is the net force 100n to the left 100 n to the right

ANEK [815]

Answer:

I believe 0 N

Explanation:

100 to the left can be said to be -100

100 to the right can be said to be +100

+100 + -100 = 0

3 0

3 years ago

There is a single electron at a distance from the point charge. On which of the following quantities does the force on the elect

Anon25 [30]

Answer:

The following situations apply: A, B, D.

Explanation:

The following situations apply: A, B, D.

1.) The electric force on the electron depends on A because E= F/q and thus, F=kqq_o/r^2 Ta. As you can see, the electric force depends on r^2, which is the distance between the positive charge and the negative charge, squared.

2.) As for B, the electric force on the electron depends on its charge as you can see from equation above.

3.) As for C, mass doesn't appear anyway in the equation for Force, thus, the mass doesn't matter.

4.) For D, yes, see equation for Force.

5.) For E, no

6.) For F, r in the equation for the force refers to the distance between both charges, not the radius of either charge. Thus, F doesn't matter.

7.) For G, no.

6 0

3 years ago

Read 2 more answers

A discus thrower achieves a high throw of 100m with the discus released at an angle of 30° calculate the initial speed of the di

GaryK [48]

Answer:

u = 88.54 m/s

Explanation:

Given that,

A discus thrower achieves a high throw of 100 m.

Angle of projection is 30°

We need to find the initial speed of the discuss. It is a cse of projectile motion. The maximum height reached by the discus is given by :

$H=\dfrac{u^2\sin^2\theta}{2g}$

u is the initial speed of the discus

So,

$u^2=\dfrac{2\times 9.8\times 100}{\sin^2(30)}\\\\u=\sqrt{7840}\\\\u=88.54\ m/s$

So, the initial speed of the discus is 88.54 m/s.

3 0

3 years ago

An electric current of 0.75 A passes through a circuit that has a resistance of

nordsb [41]

A. 131 V

I got it right on the quiz

5 0

3 years ago

Read 2 more answers

What is a point of view of an object used to determine another object's motion

Finger [1]

<h2><em>A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point. You assume that the reference point is stationary, or not moving.</em></h2>

7 0

3 years ago