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3 years ago

Using snell's law. Determine what angle a light wave bends at when it

Physics

1 answer:

Alex777 [14]3 years ago

7 0

Answer:

Angle of refraction is 23° .

Explanation:

$\frac{ \sin(0w) }{ \sin(0a) } = \frac{n \: a}{n \: w}$

$\frac{ \sin(30) }{ \sin \: 0a } = \frac{1.3}{1.0}$

$\sin \: 0w \: = \: \frac{ \sin(30) }{1.3}$

$= 0.3846153846$

$\sin^{ - 1} (0.3846153846$

$0w \: = \: 23 ^{o}$

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The drawing shows two long, thin wires that carry currents in the positive z direction. Both wires are parallel to the z axis. T

erica [24]

Answer:

The magnitude of the magnetic field at the origin is $2.56\times 10^{-6}\ T$ .

Explanation:

Given :

50-A wire is in the x-z plane and is 5 m from the z axis.

Also , 40-A wire is in the y-z plane and is 4 m from the z axis.

Now , since both the wire are perpendicular to each other .

Therefore , magnetic field are also perpendicular to each other .

Magnetic field at origin due to wire 1 is :

$B_1=\dfrac{\mu_oI_1}{2\pi R_1}\\\\B_1=\dfrac{(50)\mu_o}{2\pi( 5)}\\\\B_1=\dfrac{5\mu_o}{\pi}$

Magnetic field at origin due to wire 2 is :

$B_2=\dfrac{\mu_oI_2}{2\pi R_2}\\\\B_2=\dfrac{(40)\mu_o}{2\pi( 4)}\\\\B_2=\dfrac{4\mu_o}{\pi}$

Now , therefore net magnetic field is :

$B=\sqrt{B_1^2+B_2^2}\\\\B=\sqrt{(\dfrac{5\mu_o}{\pi})^2+(\dfrac{4\mu_o}{\pi})^2}\\\\B=\dfrac{\sqrt{41}\mu_o}{\pi}$

Putting value of $\mu_o=4\pi \times 10^{-7}\ H/m$

We get ,

$B=\sqrt{41}\times 4\times 10^{-7}\\B=2.56\times 10^{-6}\ T$

Therefore, the magnitude of the magnetic field at the origin is $2.56\times 10^{-6}\ T$ .

5 0

3 years ago

how will resistance change when the voltage increases in an electric circuit if the current remains constant

Yakvenalex [24]

V=IR
Potential Difference (v)= Current (A) * Resistance (Ω)
As V increases, R also increases.

3 0

3 years ago

A 500-W heating coil designed to operate from 110V is made of Nichrome wire 0.500 mm in diameter. (a) Assuming the resistivity o

Cloud [144]

The length of the wire used is 3.162 m

<h3>Resistivity of a material</h3>

The formula for calculating the power is expressed as;

P = V²/R

Determine th resistance

R = V²/P

Determine the resistance of the heating coil by substituting

R = (110²/500)

R = 12100/500

R = 24.2ohms

Determine the length of the wire

R = ρL/A such that;

L = RA/ρ

Substitute the given parameters

diameter = 0.5 mm = 0.0005m

radius = 0.0005/2 = 0.00025 m

Determine the area

A = πr²

A = π * 0.00025²

A = 1.96*10^-7 m²

Determine the length

L = (24.2 * 1.96*10^-7 / 1.50*10^-6) =

L = 3.162 m

Hence the length of the wire used is 3.162 m

The length of the wire used is 3.162 m

Learn more on resistivity here; brainly.com/question/24858512

#SPJ4

3 0

1 year ago

A 0.50 kg object is at rest. A 2.88 N force to the right acts on the object during a time interval of 1.48 s. a) What is the vel

Murljashka [212]

Answer:

8.5m/s

Explanation:

We are given that

Mass of object=m=0.50 kg

Initial velocity, u=0

Force=F=2.88 N

Time=1.48 s

a.We know that

$F=ma$

Using the formula

$2.88=0.50a$

$a=\frac{2.88}{0.50}=5.76m/s^2$

$a=\frac{v-u}{t}$

Using the formula

$5.76=\frac{v-0}{1.48}$

$v=5.76\times 1.48=8.5m/s$

Hence, the velocity of the object at the end of this time interval=8.5m/s

8 0

3 years ago

Suppose you take two non-zero displacements represented by vectors A & B.The magnitude of A is 5 m and the magnitude of B is

olga55 [171]

Answer:

a. When the total displacement is -(A + B)

b. A + B = 1 m or -(A + B) = -11 m

c. 0 m

Explanation:

a. Under what circumstances can you end up back at your starting point?

If we have the displacement A and displacement B. The total displacement is A + B. We would end up at the starting point if we take a displacement -(A + B) from point B

b. What is the magnitude of the largest displacement you can end up from the starting point?

The maximum displacement we can obtain is when A and B are in the same direction. So A + B = 5 m + 6 m = 11 m or -A - B = -(A + B) = -11 m.

c. When A and B are perpendicular, what is the component of B in the direction of A?

Since A is perpendicular to B, the angle between A and B is 90°

So the component of B in A,s direction is Bcos90° = B × 0 = 0 m

8 0

4 years ago