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WorksheetsLight (IGCSE)
Total questions: 17
Worksheet time: 11mins
To two decimal places, what is the refractive index of the plastic?
Light is an example of a transverse wave
True
False
The critical angle in the diagram is 43 degrees. What is the angle of refraction at the critical angle?
Less than 43
Equal to 43
More than 43 but less than 90
Equal to 90 degrees
Given that the angle of incidence = 30 degrees
a. Draw a ray diagram, labelling clearly the normal, incident ray, angle of incidence, reflected ray and angle of reflection accurately.
Which is the correct diagam?
If a capital letter R is seen in an ordinary mirror, what does it look like?
A
B
C
D
This reflection is
specular.
diffuse.
Images in a plane mirror are
real
larger
same size
smaller
When light passes from air to water, what happens to the speed of the light?
speeds up
slows down
stays the same
You are able to see the road cone in the picture because
orange light travels faster than any other light
the orange light was absorbed into the cone and all other colours were reflected
the orange light was reflected and all other colours were absorbed
only orange light struck the road cone
If v is the speed of light in a medium and c is the speed of light in vacuum, the formula to calculate the refractive index (n) of a medium is
n=cv
n=v/c
n=c/v
v=nc
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
What happens to the frequency of a light wave as it propagates from glass into air?
It remains constant.
It slows down.
It speeds up.
It bends.
A light ray containing two different wavelengths is incident at a cetain angle on a block of glass. What color can be associated with the refracted rays 𝒓𝟏 and 𝒓𝟐 respectively according to the figure shown below?
r1 = red r2 = blue
r1 = red r2 = yellow
r1 = green r2 = red
r1 = green r2 = violet
