Thin Lenses & Dispersion of Light

A virtual image formed by a plane mirror is always:

• Inverted and magnified

• Upright and diminished

• Upright and the same size

• Inverted and the same size

Where must an object be placed for a converging lens to act as a magnifying glass?

• Beyond 2F

• Between F and 2F

• At 2F

• Within F

What type of lens is used to correct short-sightedness?

• Converging lens

• Diverging lens

• Plane lens

• Bifocal lens

The separation of white light into its constituent colors is called:

• Reflection

• Refraction

• Dispersion

• Diffraction

Which color of light in the visible spectrum has the longest wavelength?

• Violet

• Blue

• Red

• Green

Light of a single frequency is called:

• Polychromatic light

• White light

• Monochromatic light

• Infrared light

A virtual image cannot be:

• Seen by the eye

• Formed by a lens

• Projected onto a screen

• Upright

Long-sightedness is corrected using a:

• Diverging lens

• Converging lens

• Plane mirror

• Concave mirror

In the visible spectrum, which color has the highest frequency?

• Red

• Yellow

• Blue

• Violet

Which of the following is an example of a source that produces light that is closest to being monochromatic?

• A light bulb

• The Sun

• A laser

• A candle flame