Understanding Light and Vision

What did the ancient Greeks believe about vision?

• Vision was a result of sound waves.

• Vision was due to light entering the eyes.

• Vision was a mystical process.

• Vision was due to rays emitted from the eyes.

Who was the first to test the Greek theories of vision?

• Euclid

• Ibn Al-Haytham

• Newton

• Einstein

What did Ibn Al-Haytham's experiments prove about light?

• Light is a mystical force.

• Light is a form of sound.

• Light enters the eyes.

• Light is emitted by the eyes.

What did Newton discover about light and color?

• Color is a trick of perception.

• Color is unrelated to light.

• Color is an intrinsic property of light.

• Color is only visible in the dark.

What did the double slit experiment demonstrate about light?

• Light is a sound wave.

• Light is a wave.

• Light is invisible.

• Light is a particle.

What did William Herschel discover beyond the visible spectrum?

• Ultraviolet light

• Infrared light

• X-rays

• Gamma rays

What did Johann Ritter discover at the other end of the spectrum?

• Infrared light

• Radio waves

• Ultraviolet light

• X-rays

What did James Clerk Maxwell unify in the 19th century?

• Electricity and magnetism

• Heat and light

• Color and sound

• Light and sound

What did Max Planck's theory of quanta suggest about light?

• Light is a form of heat.

• Light is a mystical force.

• Light is composed of particles.

• Light is a continuous wave.

What did Einstein's explanation of the photoelectric effect demonstrate?

• Light is only a wave.

• Light is unrelated to electricity.

• Light is only a particle.

• Light behaves as both a wave and a particle.