Foundations of Virtual Reality Nptel Week 2 Answers
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Foundations of Virtual Reality Nptel Week 2 Answers (July-Dec 2025)
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Question 1. What is the Minimum number of frames per second at which continuous apparent motion occurs, rather than frames perceived individually?
a) 2
b) 5
c) 12
d) 24
e) 60
f) None of the above
Question 2. What is a sensor/sense as defined in class?
a) Sense organ
b) Transducer
c) Human eye
d) The sixth sense
e) IMU
f) None of the above
Question 3. What is a similarity between the human senses and the engineered sensors?
a) Both convert real-world energy into some sort of signal.
b) Both have a high-frequency rate of sensing.
c) Both are completely immune to errors.
d) Both require constant calibration.
e) Both have been known to give cryptic error messages when exposed to cosmic radiation.
f) None of the above.
These are Foundations of Virtual Reality Nptel Week 2 Answers
Question 4. In the context of eye tracking for HMDs, how many DOFs does the human eye have; consider head movement, eye rotation, and accommodation.
a) 2
b) 3
c) 6
d) 8
e) More than 9
f) None of the above
Question 5. As discussed in class, how many DOFs does the human ear have?
a) 2
b) 3
c) 5
d) 6
e) 7
f) None of the above
Question 6. What is the largest number of DOFs that the Oculus Quest 2 HMD can track?
a) 3
b) 4
c) 5
d) 6
e) 9
f) None of the above
Question 7. What is the artificial stimulus produced by audio displays?
a) Light waves
b) Air pressure waves
c) Cutaneous feedback force
d) Kinesthesia
e) Optical distortion
f) None of the above
Question 8. What is the artificial stimulus produced by visual displays?
a) Light waves
b) Air pressure waves
c) Cutaneous feedback force
d) Kinesthesia
e) Optical distortion
f) None of the above
Question 9. Which one of the following is a visual display as defined in class?
a) CPU
b) Camera
c) Speaker
d) Haptic gloves
e) Phone screen
f) Headphones
g) None of the above
Question 10. Any Moving object on a digital screen with 12 FPS refresh rate will appear continuous.
a) True
b) False
Question 11. Any moving object on a digital screen with 1000 FPS refresh rate will appear continuous.
a) True
b) False
These are Foundations of Virtual Reality Nptel Week 2 Answers
Question 12. As commonly used in class, what does IMU stand for?
a) Intensive Management Unit
b) Irish Missionary Union
c) Interface Motion Utility
d) Inertial Measurement Unit
e) Interactive Multisensor Utility
f) None of the above
Question 13. Which one is NEVER a part of an IMU?
a) Accelerometer
b) Gyroscope
c) Camera
d) Magnetometer
e) None of the above
Question 14. An accelerometer measures:
a) Linear acceleration due to gravity.
b) Linear acceleration due to forces (other than gravity) acting on the accelerometer.
c) Linear velocity due to accelerometer translations.
d) Angular acceleration due to accelerometer rotations.
e) The vector sum of Linear acceleration due to gravity and Linear acceleration due to forces (other than gravity) acting on the accelerometer.
f) None of the above.
Question 15. A magnetometer measures:
a) Angular accelerations due to Earth rotation.
b) Earth angular velocity.
c) The vector pointing towards the Earth’s magnetic pole (like a compass).
d) The 3D magnetic field that passes through it.
e) The spin direction of nearby electrons.
f) None of the above.
These are Foundations of Virtual Reality Nptel Week 2 Answers
