Light
and Refraction
- What is refraction? What causes refraction?
- what factors affect the amount of refraction?
- State the three laws of refraction.
- Draw a labelled diagram to show the
incident ray refracted ray and the angles of incidence and refraction.
- Explain using a diagram what is meant
by critical angle and total internal reflection.
- Explain what is meant
by dispersion. Draw a diagram to show dispersion. List the colours
of the spectrum.
- What processes are involved in the formation
of a rainbow.
- Draw diagrams to show the refraction
of a light ray
(a)
passing from air to water
if the ray strikes the surface at 90 degrees
(b)
passing from air to water
if the ray strikes the surface with an incident angle of about 60
degrees.
(c)
passing from water to
air if the ray strikes the surface with an incident angle of about
30 degrees.
- Draw ray diagrams and describe the image
in the following situations.
(a) A 1 cm high object is placed 6 cm in front of a biconvex lens
with a focal length of 2 cm at each side of the lens.
(b) A 1 cm high object is placed 4 cm in front of a biconvex lens
with a focal length of 2 cm at each side of the lens.
(c) A 1 cm high object is placed 3 cm in front of a biconvex lens
with a focal length of 2 cm at each side of the lens.
(d) A 1 cm high object is placed 1 cm in front of a biconvex lens
with a focal length of 2 cm at each side of the lens.
(e) A 1 cm high object is placed 4 cm in front of a biconcave lens
with a focal length of 2 cm at each side of the lens.
(f) A 1 cm high object is placed 1 cm in front of a biconcave lens
with a focal length of 2 cm at each side of the lens.
http://micro.magnet.fsu.edu/primer/java/lens/bi-convex.html
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