Light behaves like both a particle and a ______.

• Mass
• Wave
• Current

What color has the shortest wavelength, or the highest frequency?

• yellow
• blue
• red
• violet

The full spectrum of light energy is called the__________

• broad spectrum
• electromagnetic spectrum
• helium spectrum 
• natural light spectrum

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

• moon

• sun

• waves

• fire

4 is 

• radio
• UV 
• Visible Light
• X-ray

EM waves have the same speed but different:

• frequency & medium 
• wavelength & frequency
• medium & wavelength
• color & medium

Which wavelength of visible light has the lowest energy?

• Red
• Yellow
• Orange
• Blue

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

• Only I

• Only II

• Only III

• I and II

• I,II and II

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 ?

• Only 1

• Only 2

• Only 3

• 2 and 4

• 2,3 and 4

• 1

• 2

• 4