WorksheetsIllumination
Total questions: 15
Worksheet time: 15mins
Name
Class
Date
1.
Light travels
a)
around corners
b)
in a straight line
2.
Light bounces when it is
a)
reflected
b)
absorbed
c)
refracted
3.
mirror
a)
absorbs
b)
reflects
c)
refracts
4.
Which images are opaque?
a)
A & C
b)
A,C,E, & F
c)
D, E, & F
d)
A & E
5.
Opaque means...
a)
No light passes through it
b)
All light passes through it
c)
Some light passes through it
6.
Blurs light as it passes through
a)
Transparent
b)
Translucent
c)
Opaque
d)
Refraction
7.
Allows most light through
a)
eflection
b)
Refraction
c)
Translucent
d)
Transparent
8.
which is a transparent object
a)
glass
b)
copper
c)
iron
d)
steel
9.
Which travels faster?
a)
sound
b)
light
c)
water
10.
Which material is NOT translucent?
a)
Brick
b)
Tissue paper
c)
Thin sheet of plastic
11.
What is light?
a)
A form of energy
b)
A form of sound
c)
bright stuff
d)
A form of excitement
12.
Which material is opaque?
a)
Brick
b)
Water
c)
Tissue Paper
d)
Glass
13.
Which material is transparent?
a)
Clear glass
b)
Tissue paper
c)
Shoe
d)
Wax paper
14.
What is the main source of light?
a)
Light bulbs
b)
Candles
c)
Sun
d)
Fluorescent lights
15.
A public school law requires a minimum illuminance (E)
of 160 lx at the surface of each students desk. An architects specifications call for classroom lights to be located (r) 2.0 m above the desks. What is the
minimum luminous flux (P) that the lights must produce?
a)
6.0 ×103 lm
b)
7.0 ×103 lm
c)
8.0 ×103 lm
d)
9.0 ×103 lm
100 %
