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Light

Total questions: 51

Worksheet time: 31mins

Name
Class
Date
1.
Light behaves like both a particle and a ______.
a)
Mass
b)
Wave
c)
Current
2.
What color has the shortest wavelength, or the highest frequency?
a)
yellow
b)
blue
c)
red
d)
violet
3.
The full spectrum of light energy is called the__________
a)
broad spectrum
b)
electromagnetic spectrum
c)
helium spectrum 
d)
natural light spectrum
4.

What is the earth's primary source of light energy?

a)

moon

b)

sun

c)

waves

d)

fire

5.
4 is 
a)
radio
b)
UV 
c)
Visible Light
d)
X-ray
6.
EM waves have the same speed but different:
a)
frequency & medium 
b)
wavelength & frequency
c)
medium & wavelength
d)
color & medium
7.
Which wavelength of visible light has the lowest energy?
a)
Red
b)
Yellow
c)
Orange
d)
Blue
8.

Which of the following information below is true for the light ray from a light source?

I. Light travels in a straight line

II. The speed of light is 300.000 km/s

III. The speed of light depends on the source

a)

Only I

b)

Only II

c)

Only III

d)

I and II

e)

I,II and II

9.

The illumination at point O on the screen is E. In which direction does the light source should be moved to increase the illumination at point O ?

a)

Only 1

b)

Only 2

c)

Only 3

d)

2 and 4

e)

2,3 and 4

10.

Illumination at point O from both light sources is the same. What is the ratio of the luminous intensity of the light sources  I1I2\frac{I_1}{I_2}   ?

a)

12\frac{1}{2}

b)

1

c)

14\frac{1}{4}

d)

2

e)

4

11.

Which of the following statement(s) is true ?

I. The unit of luminous flux is lumen.

II. The unit of luminous intensity is candela.

III. The unit of illumination is lux.

a)

Only I

b)

Only II

c)

Only III

d)

I and II

e)

I,II and III

12.

What is the definition of the ray model of light?

a)

Light travels in a straight path and its direction can be changed by encountering a boundary.

b)

Objects that emit their own light.

c)

The rate at which a luminous source produces light energy.

d)

The rate at which light strikes a unit area of a surface.

13.

Objects that can be seen due to light reflecting from them are called

a)

Luminous flux

b)

Luminous sources

c)

Illumminate sources

d)

Power sources

14.

Objects that absorb and reflect light but do not transmit it are

a)

transparent

b)

translucent

c)

opaque

d)

luminous

15.

All three types of objects (transparent, translucent and opaque) absorb some light.

a)

True

b)

False

16.

What is the definition of luminous flux?

a)

Light travels in a straight path and its direction can be changed by encountering a boundary

b)

Objects that emit their own light

c)

The rate at which a luminous source produces light energy

d)

The rate at which light strikes a unit area of a surface

17.

Luminous flux depends on the distance from the light source.

a)

True

b)

False

18.

What did Ole Roemer discover about the orbit of Jupiter's moon Io?

a)

That it used to be a part of Jupiter.

b)

Io's orbit changed based on the position of earth in it's orbit

c)

The orbit was a constant value of 45 hours

19.
What is the correct order of the colors of the rainbow?
a)
Red, Yellow, Orange, Blue, Indigo, Violet
b)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
c)
Yellow, Orange, Red, Green, Blue, Violet, Indigo
20.
Which of these is an example of a translucent object?
a)
glass
b)
book
c)
opaque
d)
waxed paper
21.
The three primary colors of light are
a)
Red, Blue, Yellow
b)
Pink, Green, Blue
c)
Violet, Green, Red
d)
Blue, Green, Red
22.
What colours is white light made from?
a)
Orange, Green, Pink, Magenta, Peach, Rose, Lemon
b)
Red, Orange Yellow, Green, Black, Indigo, Violet
c)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
d)
Red, Orange, Yellow, Grey, Blue, Indigo, Violet
23.
Which color of light is produced when all of the colors of visible light in the electromagnetic spectrum are combined?
a)
gray
b)
white
c)
black
24.
Which statement BEST describes the relationship between visible light and the electromagnetic spectrum?
a)
Visible light and the electromagnetic spectrum are different names for the same phenomenon.
b)
Visible light occupies about half of the electromagnetic spectrum.
c)
Visible light is a narrow band in the electromagnetic spectrum.
d)
Visible light and the electromagnetic spectrum have a small area of overlap.
25.
Which of these colors of visible light has the shortest wavelength?
a)
red
b)
green
c)
violet
d)
yellow
26.
A mixture of cyan and yellow paints gives ________ paint.
a)
Green
b)
Red
c)
Black
d)
Blue
27.
Adding red and green spotlights gives us what color?
a)
Cyan
b)
Yellow
c)
Blue
d)
Magenta
28.
Suppose that two flashlight beams are shone on a white screen, one through a pane of blue glass and the other through a pane of green glass.  What color appears on the screen where the beams overlap?
a)
Yellow
b)
Green
c)
Cyan
d)
Magenta
29.
A mixture of magenta and green light gives white light.  These two colors are _________
a)
Additive primaries
b)
Secondary colors
c)
Complementary colors
d)
Fluorescent colors
30.

The light bulb is....

a)

luminous

b)

illuminated

31.

Light travels in a _________ path.

a)

circular

b)

straight

c)

curved

32.

The first to hypothesize that light had a finite speed was

a)

Ole Roemer

b)

Isaac Newton

c)

Gallileo

d)

Albert Michelson

33.

Scientist who measured the speed of light with an 8-sided rotating mirror

a)

Isaac Newton

b)

Gallileo

c)

Ole Roemer

d)

Albert Michelson

34.

TRUE OR FALSE. Among all colors of light, RED has the longest wavelength.

a)

TRUE

b)

FALSE

35.

The primary pigment colors are

a)

yellow, cyan, magenta

b)

red, green, blue

c)

red, blue, yellow

d)

red, cyan, magenta

36.

Why do you see a banana yellow instead of red?

a)

the banana absorbs yellow light

b)

the banana only reflects yellow light

c)

the banana emits yellow light

37.

What color light does a banana absorb?

a)

every color except for yellow

b)

yellow light

c)

it doesn't absorb light

38.

If red were listed in this chart, what could be a possible wavelength measurement for it?

a)

405

b)

600

c)

313

d)

505

39.
What do we call this tool that separates white light into the colors of the Visible Spectrum?
a)
tuning fork
b)
prism
c)
microscope
d)
graduated cylinder
40.
a)

Location A

b)

Location B

c)

Location C

d)

Location D

41.
The apple is red all colors are absorbed except for red.  This means that red is being _______ back to our eyes.
a)
refracted
b)
trasmitted
c)
reflected
d)
absorbed
42.
Does the scarf reflect or absorb yellow?
a)
Reflect
b)
Absorb
43.
_____?_____ materials allow light waves to pass through easily.
a)
Opaque
b)
Transparent
c)
Translucent
44.

The picture show light shined on an object. The object is BEST described as what?

a)

Transparent

b)

Opaque

c)

Translucent

d)

Shimmery

45.

What happens when light passes through a prism?

a)

The light separates into different colors.

b)

The light mixes together.

c)

The light gets brighter.

d)

The light stays the same.

46.
Which color absorbs all light?
a)
White
b)
Black
c)
Orange
d)
Green
47.
What are the three secondary colors of light?
a)
Red, Green, Blue
b)
Green, Yellow, Blue
c)
Cyan, Magenta, Yellow
d)
Magenta, Yellow, Black
48.

When the three primary colors mix they produce?

a)

Red, Green, Blue

b)

Black

c)

White

d)

Magenta, Yellow, Cyan

49.
When do you use the RGB (red, green, blue) system?
a)
Printing
b)
Painting
c)
Cell Phone screens
50.
When magenta, cyan and yellow pigments overlap, they will create what color?
a)
Red
b)
Blue
c)
White
d)
Black
51.

A shirt appears yellow under normal white light conditions. What color does it appear if illuminated with cyan light?

a)

Red

b)

Green

c)

Blue

d)

Yellow

e)

Black

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