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Completed: / exercises

QUIZ: Light and Optics

Due date: .

Topics

Assumptions

In all of the questions in this quiz, unless otherwise stated, assume a person with no vision defects and a simplified model of an HMD as discussed in class.

Comments or Concerns

Leave any comments about the questions below here. For example, if any of the questions seem unfair, or confusing. This is not a graded question, you don't have to write answers here.

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Question 1

What is the term for the bending of light as it passes from one material into another?
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Question 2

What is the diopter of a lens with a positive focal distance of f = 5 cm?
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Question 3

Diopters are a convenient way to quantify optical power because they allow one to calculate the optical power of a system of lenses by __________________ the diopters of all lenses in the system.
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Question 4

Consider the following graph for spectral reflectance. What color will this object appear in daylight?
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Question 5

Think about a laser emitting red light rays in 3 dimensions which pass through a spherical lense. If the rays have one focal point in one plane, and a different focal point in another plane, what type of optical aberration is it?
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Question 6

Think about white light rays propagating in 3 dimensions and passing through a spherical lense. If the rays have multiple focal points depending on the wavelength, what type of optical aberration is it?
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Question 7

What is collimated light?
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Question 8

How far should the source of light be from a converging lens to produce parallel rays coming out of the lens?
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Question 9

Lenses in modern head-mounted displays enable users to focus on a display that is very close to their eyes by producing __________.
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Question 10

Which of the following statements is NOT true about spherical lenses commonly used in modern head-mounted displays?
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Question 11

Which one of the following is NOT a problem commonly associated with spherical lenses in modern HMDs?
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Question 12

Optical distortion occurs when straight lines appear curved after looking through the lens.
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Question 13

What is the main cause of chromatic aberration?
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Question 14

In an HMDs virtual objects appear as if they are at infinity because:
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Question 15

Why do young people who are farsighted usually not need glasses when using an HMD?
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Question 16

Why do nearsighted people typically need glasses when using an HMD?
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Question 17

Human eyes adjust their focus (accomodation) to see real-life objects at different distances, but in VR, the focus is typically fixed, and accommodation does not occur.
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Question 18

Vergence is coupled with accommodation when observing virtual objects in HMDs.
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Question 19

Why is accommodation typically missing in an HMD?
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Question 20

What is VR vergence-accommodation mismatch, and why does it occur?
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Authors

Anna LaValle.
?
Lectures and labs schedule for the VR Systems and Humans course, Fall 2024
Lecture slides, VR Systems and Humans course, University of Oulu
Informative Guides to Help You Design, Develop, and Distribute Your VR App.
The platform for interactive, real-time, 3D content creation.
Virtual Reality, LaValle 2016 is the free online textbook we use in this course.
YouTube Channel: VR Systems and Humans, Fall 2022
University of Oulu