U10: Light Optics Corrections Quiz

Which electromagnetic waves have the highest frequencies and the shortest wavelengths?

• microwaves
• visible light
• gamma rays

Which color has the shortest wavelength?

• Red

• Orange

• Green

• Violet

Why does green grass look green?

• It reflects all colors except green.
• It absorbs all colors except green.
• It only absorbs green.
• The colors mix to make green.

The point where the rays meet is known as....

• Fire
• the focal point
• refraction
• Plane of the lens

If you're standing 12 meters in front of a plane mirror, how far away is your image from you?

• 6

• 12

• 18

• 24

Which type of lens is shown?

• Concave
• Convex
• Reflective
• Refracting

A pencil appearing to bend when it is immersed in a glass of water is an example of...

• Reflection
• Rarefaction
• Refraction
• Reconstruction

A convex lens is a __________ device.

• Convergent
• Divergent
• Reflective
• None of the above

A Concave lens is a __________ device.

• Convergent
• Divergent
• Reflective
• None of the above

If the D_i is 30 cm and the D_o is 45, what is the focal length?

• 18 cm
• .055556 cm
• 75 cm
• 15 cm