Page 2 - Competency Based Worksheet- Light

b) Rainbow is an example of dispersion of light. (True/False)
c) The colour with the highest wavelength bends the ______, and the colour with
the ______ wavelength bends the most.
d) What do you mean by dispersion?

8. Animation works by using an optical illusion. By presenting a sequence of still images in
quick enough succession, the viewer interprets them as a continuous moving image.
This is the same principle that enables live action film making and projection to work.
Film theorists often refer to this illusion of movement as the persistence of vision.
Persistence of vision works because the human eye and brain can only process 10 to
12 separate images per second, retaining an image for up to a sixteenth of a second. If
a subsequent image replaces it in this period of time it will create the illusion of
continuity. In cinematic frame rate, film is traditionally shot at is 24 frames per second.

a) Cinematic frame rate: Traditionally, film is shot at _______ frames per second.
b) What should be the minimum frame rate of motion pictures so that we can
distinguish between different images?
c) Write two applications of persistence of vision.
d) Once an image is formed on our retina, it remains there for 1/12th of a second.
(True/False)

9. a) Label the parts A, B, C, D, and E.
b) Write the function of each part.
c) How is it possible for us to see distant and nearby
objects clearly?

10. a) Label the blind spot in the diagram.
b) Why is it called the blind spot?

11. a) Identify the eye defect shown in
the diagram.
b) How can it be corrected?

12.
a) What is the function of the ciliary muscles?
b) If you wave your hand very fast in front of your eyes, your fingers appear blurred.
What could be the reason?
c) What is meant by the power of accommodation?