Light and Lenses

What does this symbol mean?

• Frequency

• Wavelength

• Speed

• Crest

What always happens to light as it enters a more dense medium?

• changes direction

• speeds up

• slows down

• changes frequence

Frequency is...

• length of one complete wave

• time it takes for one whole wave cycle

• displacement from equilbrium

• number of waves per second

If the speed of light is 3x10⁸m/s and the wavelength is 400x10^-9m, what is the frequency?

• 7.5x10¹⁴Hz

• 7.5x10¹⁰Hz

• 7.5x10^-14Hz

• 7.5 Hz

What happens above the critical angle?

• Diffraction

• Reflection

• Total Internal Reflection

• Refraction

What is the name we give F?

• Principle focus

• Axis

• Focal length

• Image

Which words below best describe the image formed?

• virtual, inverted, magnified

• real, inverted, same size

• real, upright, same size

• virtual, upright, diminished

Apart from being virtual, what else is this image?

• magnified, inverted

• magnified, upright

• upright, diminished

• upright, same size

Name a real life use of this..

• Projector

• Camera

• Magnifying Glass

• Photocopier

What Physics idea is shown in the image?

• diffraction

• refraction

• dispersion

• reflection