The document discusses color and how objects appear colored. It explains that: - The color of an object appears depends on which colors of light it reflects and which it absorbs. A red object reflects red light and absorbs other colors, appearing red. - A mixture of reflected colors is seen as a single color by our eyes. A pink object reflects more than one color, and we perceive the mixture as pink. - In subtractive color mixing, new colors are obtained by combining paint colors through absorption rather than reflection. Cyan, magenta, and yellow can be mixed in different combinations to produce other colors.

1. PHYSICS
7.6-Investigating colour
VIII-Cambridge
Sir.Muhammad A.Mageid

2. Why a red apple appears red in
white light ?!
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3. 1.
Reflecting
colours
The colour of an object appears depends on which
colours of light the object reflects :
 A white object appears white in white light –Because
it reflects all colours falling onto it
 A totally black surface does not reflect any of the
colours in white light –Because it absorbs them all
 A red surface reflects only the red parts of the
spectrum and absorbs all of the others
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4. Reflecting
colours
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5. What would happen if
you tried to shine blue
light onto a red object?
The object will not reflect any of the
light .This means it will look black

6. 2.
colour
combinations
The spectrum contains a wide range of colours but we
can sense many more colours .Some surfaces can reflect
several parts of the spectrum while absorbing most
others .
 A pink object looks pink because it reflects more than
one colour of light
 Our eyes detect this mixture of colour and we see the
mixture as pink
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7. MIXING PAINTS
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8. “
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9. “
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10. Subtractive
colour
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1 2 3
A new colour is obtained by mixing in different
combination
e.g.: Cyan –Magenta (Purple) –Orange

11. Q-1-
Complete
this
table
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Paint colours mixed Colour produced
Red and yellow
Blue and yellow
Red , yellow and blue
Yellow and magenta
Yellow ,magenta and cyan

12. Q-2-COPY AND COMPLETE THIS
EXPLANATION ABOUT A GREEN COLOUR
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13. “
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1- A green dress illuminated by white light will
appear -----------------
2- A green dress illuminated by a green light
will appear-------------.It---------------the green light
3- A green dress illuminated by a red light will
appear ----------.It is -------the red light

14. About
colours
Yellow
Is the color of
gold, butter and
ripe lemons. In
the spectrum of
visible light,
yellow is found
between green
and orange.
Blue
Is the colour of
the clear sky
and the deep
sea. It is located
between violet
and green on
the optical
spectrum.
Red
Is the color of
blood, and
because of this
it has historically
been associated
with sacrifice,
danger and
courage.
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