Docsity
Log inSign up
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search Store documents

The best documents sold by students who completed their studies

Search through all study resources
Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

University Rankings

Discover the best universities in your country according to Docsity users

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

From our blog

Exams and Study
Go to the blog

Optics Laboratory Investigation: Exploring Light Refraction with Buggé's Optics 6, Study notes of Optics

University of AberdeenOptics

A laboratory investigation adapted from Daubert's Optics 6 textbook, focusing on observing and understanding light refraction through various materials. Students are guided to measure angles, analyze data, and apply Snell's law to predict and test refraction phenomena. Topics include incident and refracted angles, indices of refraction, and total internal reflection.

What you will learn

  • How does the index of refraction explain why light bends when it enters water?
  • How does the index of refraction vary for different colors of light?
  • What happens to the laser beam as it enters water?
  • What is the relationship between the incident angle and the refracted angle according to Snell's law?
  • Why does a second, lighter ray appear when the laser beam reflects off water?

Typology: Study notes

2021/2022

Uploaded on 09/27/2022

scotcher
scotcher 🇬🇧

4.4

(12)

256 documents

1 / 5

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Buggé: Optics 6
Laboratory investigation adapted from Daubert
Observation Experiments: Light Bending
Go to:
http://phet.colorado.edu/en/simulation
/bending-light
You have a laser beam (press the
button to turn it on!) that is shining
from air into some other material such
as water, glass, mystery material A,
or mystery material B. Use water for
part 1 of this lab.
Part 1: Observational Experiments
Grab the protractor from the toolbox and set it up so that you can easily measure the angle at which the laser
beam strikes the water (relative to the normal line) and the angle that it makes with the normal line once it is in
the water.
1. What happens to the laser beam as it enters the water?
2. Do you notice a second, lighter ray that is reflected off the water? Explain the path of this ray.
3. In “Laser View” - click on “wave”. Pose an explanation that explains why the light bends when it enters the
water.
pf3
pf4
pf5

Partial preview of the text

Download Optics Laboratory Investigation: Exploring Light Refraction with Buggé's Optics 6 and more Study notes Optics in PDF only on Docsity!

Observation Experiments: Light Bending

Go to:

http://phet.colorado.edu/en/simulation

/bending-light

You have a laser beam (press the

button to turn it on!) that is shining

from air into some other material such

as water, glass, mystery material A,

or mystery material B. Use water for

part 1 of this lab.

Part 1: Observational Experiments

Grab the protractor from the toolbox and set it up so that you can easily measure the angle at which the laser

beam strikes the water (relative to the normal line) and the angle that it makes with the normal line once it is in

the water.

1. What happens to the laser beam as it enters the water?

2. Do you notice a second, lighter ray that is reflected off the water? Explain the path of this ray.

3. In “Laser View” - click on “wave”. Pose an explanation that explains why the light bends when it enters the

water.

4. Collect the following data to help you find the relationship between the incident ray (the incoming laser beam

from the air) and the refracted ray (the laser beam after it is bent by the water). Measure your angles relative to

the normal.

Angle of Incident

Ray, Θ 1

sin(Θ 1 ) cos (Θ 1 ) Angle of Refracted

Ray, Θ 2

sin(Θ 2 ) cos (Θ 2 )

5. Create a relationship between two or more of the physical quantities above. Hint: See if a ratio of two of the

quantities remains constant between runs of the experiment.

6. You may have noticed this box on the right hand side that allows you to change the “Index of Refraction (n)”.

Notice the values for “n” for air and water.

Do you notice anything interesting as it relates to your equation in (5)?

7. Move the slider to change the index of refraction for both materials. What happens? How would you describe

what the index of refraction is?

8. Rewrite your equation from (5) so that it incorporates n 1 , the index of refraction for the first material and n 2 ,

the index of refraction for the second material.

Part 2: Testing Experiment

9. Create an experiment that uses the simulation to test your equation from (8). Use your equation to try to

predict something!

Index of Refraction and Total Internal Reflection

  1. Reason and Explain Different colors of light have different indexes of refraction.

Color Index of Refraction How can this information qualitatively explain why we see a rainbow

when it rains? Think of where the sun is located with respect to an

observer when the observer sees a rainbow. What assumption about the

shape of the water droplets in the air can we make?

Red 1.

Yellow 1.

Green 1.

Blue 1.

Violet 1.

1 2. Reason and Explain Explain why an asphalt or concrete road sometimes looks wet on a hot day ( hint: think about the air ). 1 3. Total Internal Reflection While scuba diving, Will shines a laser pointer from beneath the surface of the water (n=1.33) up towards the air (n=1) a. If Will shines the laser pointer at an angle of 20° with respect to the normal, what angle should the light enter the air at? Be sure to include a picture of the situation along with your mathematical reasoning. b. If Will shines the laser pointer at an angle of 70° with respect to the normal, what angle should the light enter the air at? Be sure to include a picture of the situation along with your mathematical reasoning. (were you unsuccessful in finding the angle? what happened? what do you think this could mean?)

14. Practice a. Allison sees a coin at the bottom of her swimming pool at an angle of 40 degrees to the normal and she dives in to retrieve it. However, Allison doesn’t like to open her eyes in the water so she must rely on her initial observation of the coin made in the air. At what angle does the light from the coin travel as it moves toward the surface? (nwater = 1.33) b. Here’s an interesting trick to try. Place a penny in the bottom of a cup and stand so that the penny is just out of sight as shown. Then pour water into the cup. Without moving, you will suddenly see the penny magically appear. If you look into the cup at an angle of 70 degrees to the normal, at what angle to the normal must the penny be located in order for it to appear in the bottom of the cup when the cup is filled with water? c. Rohit makes his girlfriend a romantic candlelight dinner and tops it off with a dessert of gelatin filled with blueberries. If a blueberry that appear at an angle of 44 degrees to the normal in air is really located at 30 degrees to the normal in the gelatin, what is the index of refraction of the gelatin? d. A jeweler must decide whether the stone in Mrs. Smigelski’s rig is a real diamond or a less-precious zircon. He measures the critical angle of the gem and finds that it is 31.3 degrees. Is the stone really a diamond or just a good imitation? (ndiamond = 2.41, nzircon = 1.92) e. Heather is snorkeling in Oahu’s Hanauma Bay when she looks up through the water at a palm tree on the shore. If the index of refraction of the water is 1.33 and Heather sees the palm tree at an angle of 45 degrees, at what angle is the palm tree really located with respect to the normal? f. In her bedroom, Mia has a fiber optic light that glows as hundreds of fiber optic cables are lit from below. A) If each fiber optic cable has an index of refraction of 1.48, at what critical angle must light enter the cable in order for total internal reflection to occur? B) Explain why total internal reflection is important to a fiber optic lamp.