Two Source Interference Tutorial Homework Online

Welcome to PHYS 116A. This is the third of a three-quarter sequence of introductory physics courses targeted for students in life sciences. Upon successful completion of this course, you will:

  1. Be able to apply physics to other fields of science and everyday phenomena.
  2. Be able to develop algebra-based models to describe the physical world.
  3. Be able to apply physical laws to understand the following: oscillations, waves, wave optics, ray optics, quantum mechanics, atoms and nuclear physics.

You should find this course challenging and stimulating, and I hope that you also find it interesting and enjoyable. The course consists of lecture and tutorial components. Each component provides a different way of learning the material. The course schedule is found here.


  • Below is a list of who to contact with particular questions.
    • Lecture instructor:Kazumi Tolich
    • Introductory physics administrator: Susan Miller
      Contact with questions about registering, overloading, etc...
    • Physics department undergraduate adviser: Margot Nims
      Contact if you are interested in being a physics major or minor.


  • Lectures will focus on conceptual understanding of topics in the reading that students found most difficult, and we will also work on quantitative problem solving skills. We will not go over all the material covered in the book.
  • Lectures are from 1:30 PM to 2:20 PM on Monday, Wednesday, and Friday in lecture hall A118 of the Physics and Astronomy Building auditorium wing.
  • You can find recordings of the lectures under "Panopto Recordings" on the left menu.
  • There are pre-lecture reading quizzes and in-class quizzes associated with lectures.
  • There are also suggested practice problems that are not graded.
  • Pre-lecture reading quiz
    • In order to follow the lecture, it is important that students do the assigned reading before class.
    • A quiz based on the reading and assigned through MyLab and Mastering is due at 8:00 AM on the day of the lecture that covers the particular topic.
    • There is no make-up pre-lecture reading quiz.
    • You have up to 5 attempts for each question.
    • For each wrong answer 10% of the grade is subtracted.
    • At the end of the quarter all scores are scaled by 1.25, so that 80% or above becomes 100%.
    • Note that practice problems, adaptive follow-ups, and dynamic study modules available also through Mastering are not graded, but great for your study.
  • Lecture in-class quiz
    • In order to increase participation and learning, there are quizzes during class that are assigned through Learning Catalytics. These require you to bring a web enabled device to lecture, so please contact me if you do not have access to a web enabled device.
    • Some questions are graded purely on participation, and some are graded 80% for participation and 20% for the correct answer. At the end of the quarter all scores are scaled by 1.25, so that 80% or above becomes 100%.
    • The first time I ask a question, you should answer it by yourself. Depending on the result, I may ask it a second time, in which case you should discuss with your neighbors.


  • Tutorials are from 5:00 PM to 5:50 PM on Tuesdays in lecture hall 220 of Kane hall except on the days of midterms, October 24th and November 14th.
  • Tutorials will focus on developing your conceptual understanding of physical laws though a scaffolded discovery process.
  • Tutorials consists of pretests and in-class participation with quizzes.
  • There will be suggested homework problems posted to Canvas, that will not be graded. However some long-answer problems on the midterms will be based on content from the tutorial homework, so completing the homework is highly recommended.
  • Tutorial pretests
    • NOTE: Pretests are assigned through Canvas. All other assignments are through Mastering Physics.
    • Pretests become available the Friday before the associated tutorial and must be completed by the day of the tutorial, Tuesday at 8 AM.  
    • The pretests are slightly different from pre-lecture: they are only open for 30 minutes, and after time is up your answers will be automatically submitted. Please take a screenshot of your confirmation page.
    • They are graded based on an honest attempt, so you will receive credit as long as you have attempted most of the questions, even if you run out of time.
  • Tutorial in-class
    • In a small group you will work through conceptual problems. Do not sit by yourself. If you get stuck, TAs will guide you by asking you questions rather than answering your questions.
    • Print out and bring the worksheets available in the Files link on the left.
    • In order to increase participation and learning, there are quizzes during tutorials that are assigned through Learning Catalytics. These require you to bring a web enabled device to tutorials, so please contact me if you do not have access to a web enabled device.


  • There are two midterm exams on October 24th and November 14th from 5:00 PM to 6:00 PM in Kane hall (room number 120). The detailed midterm exam procedures are discussed here. 
  • The final exam on December 11th from 2:30 PM to 4:20 PM in our regular lecture room, lecture hall A118 of the Physics and Astronomy Building auditorium wing.
  • All exams are closed-book. However, I will provide equation sheets.
  • Midterm exams have multiple-choice questions and long answer questions. Final exam has all multiple-choice questions. Therefore, you need a bubble sheet for each exam.
  • Calculators are permitted. However, the use of the text-storage capability is not permitted. Cell phones, radios, laptop computers etc that allow you to communicate with others are not permitted.
  • Note that there are no make-up exams. So, students with outside professional, service, or career commitments (i.e. military service, ROTC, professional conference presentation, NCAA sports, etc.) conflicting with the exam dates must contact me early in the quarter to establish remote examination procedures. Exam scores for students who miss an exam without making prior arrangements will be zero.

MyLab and Mastering and Learning Catalytics

Note that scores from Mastering are manually synced to Canvas, so if there is a discrepancy between these, the Mastering score is more correct, and the Canvas score should be correct at the next sync.

Getting help

OFFICE HOURS: You are strongly encouraged to visit me regularly.

Tuesdays from 1:30pm to 2:30pm in my office (B221).

Fridays from 12:15pm to 1:15pm in the study center.

DISCUSSION BOARD: If you have questions about physics or course issues, please post it under the "Discussions" menu on the left, which I will monitor a few times per week, and if no one else answers it, I will respond. You are encouraged to use this to ask your fellow students for help, or to organize study groups, etc. I have heard that there is a discussion group set up on Facebook, but I will not monitor it, and it is in no way related to me.

EMAIL: If you have a personal question, please send an email to me,

ANONYMOUS EMAIL: If you would like to send me an anonymous comment, please use the following web interface, but remember since it is anonymous, I am not able to reply.

CLUE: CLUE provides drop-in tutoring and exam reviews.


  • Knight Jones Field, College Physics a strategic approach, 3rd edition technology update, Pearson, 2017, ISBN-13: 9781323574256
  • Note:  the eTextbook is available through Mastering Physics, and you have paid for it through your registration course fee.


  • The final course grade is based on one of the following grade weightings. Your final grade will be assigned based on the option that gives you the higher grade. Therefore, if you miss a midterm for example, your grade will be determined using option 2.
  • Midterm exams40%
    Final exam20%
    Pre-lecture reading quizzes25%
    In-class quizzes10%
    Tutorial pretest5%
  • Midterm exams (better of 2)20%
    Final exam40%
    Pre-lecture reading quizzes25%
    In-class quizzes10%
    Tutorial pretest5%
  • The exams are curved, but all other aspects of the course are graded on an absolute scale, making it a little difficult to give a precise indication of your grade. The average grade in the class will be set to around 3.0 and typically between 5% and 10% students get a 3.9 or above, which leads to about 10% getting less than 2.0.
  • Check your grades regularly and report any problems to me. Exam grades should be recorded for your review within one week from the date.
  • Many majors have a minimum grade requirement for PHYS 116. Therefore, you should discuss departmental entry requirements with your undergraduate or departmental adviser, and plan your course load accordingly.

Phys 119 Labs

Taking a laboratory course, Phys 119, concurrently is strongly recommended.

Professor Henry Lubatti ( is in charge of Phys 119.

More information on the laboratory section is given here.

Many of the labs finish late at night, so I encourage all of you to look at the following useful Safety links.

Access and accommodations

Your experience in this class is important to me, so if you have a temporary health condition or permanent disability that requires accommodations (conditions include but are not limited to: mental health, attention-related, learning, vision, hearing, physical), please see detailshere (Links to an external site.)Links to an external site.. 

Safe campus

  • I am committed to ensuring a safe environment on campus. I suggest you check out the resources available here. These include services if you have a lab or tutorial that is late at night and need someone to walk with you.

The syllabus page shows a table-oriented view of the course schedule, and the basics of course grading. You can add any other comments, notes, or thoughts you have about the course structure, course policies or anything else.

To add some comments, click the "Edit" link at the top.

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