Year 9 Light waves

What is the speed of light?

• 300,000 km per second
• 300, 000 km per hour
• 300, 000 meter per second
• 300, 000 meters per hour

Wide stream of light rays, all moving in the same direction are called:

• Light ray
• Light beam
• Laser
• Lightning

The law of reflection states:

• The angle of incidence equals the angle of reflection
• The angle of incidence will be greater than the angle of reflection
• Reflection occurs on a smooth surface
• Reflection cannot occur if the angle of incidence is greater than the angle of reflection

What does this represent?

• The law of reflection
• The law of refraction
• The speed of light
• The effect of waves

Which of the following is not luminous?

• Sun
• Fire 
• Ipad screen
• Fluoro vest

What describes light sent in many directions by small particles within a substance

• Scattering
• Reflection
• Refraction
• Shrouding

What describes a substance that allows most light to pass through it, meaning that objects can be seen clearly through these substances.

• Transparent
• Translucent
• Opaque
• Obtuse

What substances allow light to come through imperfectly, as in frosted glass?

• Transparent
• Translucent
• Opaque
• Obtuse

What describes a substance that does not allow any light to pass through it?

• Translucent
• Transparent
• Opaque
• Obtuse

The mirror here is called:

• Planar
• Concave
• Convex