Refraction

What letter is used to represent the speed of light?

• c

• n

• v

• θ

What is a line drawn at 90° to a surface called?

• incident ray

• normal line

• refracted ray

• tangent

What direction does the ray bend when entering a more optically dense material, where the wave travels more slowly?

• Towards the normal.

• Away from the normal.

• No change.

• Answer is not listed above.

• Reflection
• Refraction

• Reflection
• Refraction

We see shadows because light travels in a __________________ line.

• curved
• straight
• rainbow

........... – the angle between the normal and the reflected ray.

• Angle of incidence
• Angle of reflection
• Angle of coincidence
• Angle of direction

........... – the angle between the normal and the incident ray.

• Angle of incidence
• Angle of reflection
• Angle of coincidence
• Angle of direction

The imaginary line perpendicular to a reflecting surface is called _____.

• crooked line
• parallel line
• angular line
• normal line

Law of reflection state that - The angle of incidence is .................. to the angle of reflection.

• equal
• double
• half