Light and Optics 8.1-8.3

Why does this tree make a shadow?

• It blocks light.

• It vibrates.

• It gives off heat.

How does light travel?

• In waves

• in a straight path

• does not move

Allows most light through

• eflection
• Refraction
• Translucent
• Transparent

what is the angle between the incident ray and the normal called as

• angle of incidence
• angle of reflection
• angle of convergent
• angle of divergent

If the angle of incidence is 45 degree, what is the angle between the incident ray and reflecting surface

• 45
• 90
• 180
• none of the above

Which of these is the best reflector of light?

• shiny metal
• white paper
• carpet
• wood

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

• equal
• double
• half

In the diagram, which letter represents the angle of incidence?

• A

• B

• C

• D

Which is the reflected ray?

• A

• B

• C

• D

What is the object helps the dentist to see the patient's dental condition?

• periscope

• convex mirror

• plane mirror

• concave mirror