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21 questions
Perspex has a higher refractive index (density) than air. Light entering air from perspex will
slow down slightly and be bent towards the normal
slow down slightly and be bent away from the normal
speed up slightly and be bent towards the normal
speed up slightly and be bent away from the normal
When a pencil is viewed through water, it appears bent because light
slows down as it passes from water to air
is reflected at the surface of the water
is refracted away from the normal as it passes from water to air
is refracted towards the normal as it passes from water to air
What is the meaning of the formation of a REAL image?
you can see the image of an object
the image has the same size as the object
the image can be focused on a screen
the image that is formed by a plain mirror
Comparing microwaves and ultraviolet rays
microwaves have lower frequencies
ultraviolet rays have longer wavelengths
microwaves have more energy than ultraviolet rays
ultraviolet rays are more visible than microwaves
Which of the following colours of light is most strongly refracted?
red
yellow
green
violet
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