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
Alla [95]
3 years ago
8

Identical rays of light in air are refracted upon entering three transparent materials:

Physics
1 answer:
aev [14]3 years ago
3 0

Answer:

Explanation:

for us to rank them we need to calculate the angle of refraction for the various materials. The angle of refraction is the angle between the refracted ray and the normal.

refractive index(n) = velocity of light in air/ velocity of light in medium

refractive index (n) = sini/sinr

lets equate the right side of both equations.

\frac{sini}{sinr}=\frac{c}{velocity of light in medium}

we will assume 30 degree as the angle of incidence for all materials.

(a) water

\frac{sin30}{sinr}=\frac{c}{0.75c}

sinr = 0.75c/c *sin30

sinr = 0.375

r= arcsin0.375

r=22.02°

(b) ethyl alcohol

\frac{sin30}{sinr}=\frac{c}{0.7c}

sinr = 0.7c/c *sin30

sinr = 0.35

r= arcsin0.35

r=20.49°

(c) crown glass

\frac{sin30}{sinr}=\frac{c}{0.6c}

sinr = 0.6c/c *sin30

sinr = 0.3

r= arcsin0.35

r=17.46°

it is observed that the angle of refraction decreases as the velocity of light in glass decreases.

ranking the materials  according to how much the light ray bends toward the normal, from most bending to least bending we have;

Crown glass > ethyl alcohol> water

You might be interested in
List some benefits of Cardiovascular exercise:
lozanna [386]

Answer:

Aerobic exercise reduces the risk of many conditions, including obesity, heart disease, high blood pressure, type 2 diabetes, metabolic syndrome, stroke and certain types of cancer. Weight-bearing aerobic exercises, such as walking, help decrease the risk of osteoporosis.

3 0
2 years ago
Read 2 more answers
Instruments in an airplane which is in level flight indicate that the velocity relative to the air (airspeed) is 180.00 km/h and
snow_lady [41]

Answer:

Explanation:

From the given information:

The coordinate axis is situated in the east and north direction.

So, the north will be the  y-axis and the east will be the x-axis

Similarly, the velocity of the plane in regard to the air in the coordinate system will be v_{P/A} = v( cos \theta \ i + sin \theta \ j)

where:

v_{P/A} = velocity of the plane in regard to the air

v = velocity

θ =  angle of inclination of the plane with respect to the horizontal

replacing v = 180 km/ and θ = 20° in above equation, then:

The velocity of the airplane in the coordinate system as:

v_{P} = v_o( cos \phi \ i + sin \phi \ j)

where;

v_p = velocity of the airplane

v_o = velocity

∅ = angle of inclination with regard to the base axis;

Then; replacing  v_o  = 150 km/h and ∅ = 30°

Therefore, the velocity of the plane in the system is :

v_p = v_A + v_{P/A}

v_A=  v_P  -v_{P/A}   --- (1)

v_A= ( 150 cos 30° - 180 cos 20°)i + ( 150 sin 30° - 180sin 20°)j

v_A= (-39.24 km/h)i + (13.44 km/h) j

The magnitude is:

v_A= (-39.24 km/h)i + (13.44 km/h) j

|v_A|^2 = \sqrt{ (-39.24 km/h)^2+ (13.44 km/h)^2}

v_A = 41.48 km/h

The airplane is moving at an angle of the inverse tangent to the abscissa and ordinate.

The angle of motion is:

tan θ = 39.24/13.44

tan θ = 2.9

θ  = tan ^{-1} (2.9)

θ  =  70.97°

The angle of motion is  70.97° from west of north with a velocity of 41.48 km/h.

5 0
3 years ago
How do I solve this?​
prohojiy [21]

unlock your inner brain

3 0
2 years ago
PLEASE HELP!!! WILL GET BRAINIEST FOR 5 SENTENCES
emmasim [6.3K]
Hello.

BEVs and hydrogen fuel cell vehicles are a more promising transportation technology for the future because they reduce greenhouse gas emissions as well as CO2 making it more 'green.' The second question is your opinion, in mine no, they should not be required but they should at least be considering.
Have a nice day
5 0
3 years ago
Need help best answer will get brainiest
solong [7]

Answer:

1) A trait is a specific feature or characteristic, typically genetic.

2) One trait that helps an animal survive is a Chameleon's camouflage. Camouflage helps the chameleon blend in with their surroundings to avoid a predator or to sneak up on prey.

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is fiery about igneous rocks?
    13·2 answers
  • What information is required when calculating speed or acceleration?
    6·1 answer
  • Multiple-Concept Example 4 deals with a situation similar to that presented here. A marble is thrown horizontally with a speed o
    15·1 answer
  • Calculate the pressure produced by a force of 1500 N acting on an area of 6 m​2​
    12·2 answers
  • Two 2.0-cm-diameter insulating spheres have a 6.60 cm space between them. One sphere is charged to + 76.0 nC , the other to - 30
    10·1 answer
  • System uses 49J of energy to do work in the change of internal energy is 58 j. how much heat was added to the system?
    10·1 answer
  • The flow of electric current through a gas without any external influence (ionizer) is called
    11·1 answer
  • television set changes electrical energy to sound and light energy. In this process, some energy is *
    6·1 answer
  • When a student stands on a rotating table
    10·2 answers
  • Hey, guys I kinda need help with this question, 1. The number of atoms of each element are not equal on both sides of the equati
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!