Light sources give out energy, we say they are
opaque
umbra
luminous
Sally has her own puppet show, when she brings out one of her puppets what is the fuzzy area around the shadow called?
penumbra
infrared radiation
umbra's appear when you use...
spread out source of light
point source of light
none of the above
look at the picture. If the middle card would move a bit, would Anna be able to see?
yes
no
When you take a picture of your friend then your friend is the
image
object
detector
which principle does a pinhole camera work on?
rectilinear propogation of light
LASER
light intensity
name a property of a pinhole camera
laterally inverted
upright
inverted
which scientist explained how a pinhole camera works
Ibn Batuta
Ibn Sinha
Al Hathyam
In the past how did people capture images
using film
CCDs
Lasers
How do people store images these days?
film
lasers
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