Light Properties and Behavior

The video tutorial covers the basics of light, including its properties, behavior as particles and waves, and sources. It explains the types of mediums light can pass through and how light is measured in terms of flux, illuminance, and intensity. The speed of light is discussed, including historical attempts to measure it. The tutorial concludes with a summary of the key points.

What evidence supports the idea that light travels in straight lines?

• The creation of shadows

• The formation of rainbows

• The bending of light through a prism

• The scattering of light in fog

Which scientist proposed that light is composed of tiny particles?

• James Clerk Maxwell

• Isaac Newton

• Albert Einstein

• Galileo Galilei

What is a key limitation of Newton's particle theory of light?

• It cannot explain the speed of light

• It ignores the existence of photons

• It does not account for light's wave properties

• It fails to describe light's color spectrum

What happens to a light ray when it encounters an obstacle?

• It reflects or refracts

• It accelerates

• It bends around the obstacle

• It stops completely

Which of the following is a natural source of light?

• Sun

• LED bulb

• Neon sign

• Flashlight

What type of material allows light to pass through but not clearly?

• Translucent

• Opaque

• Transparent

• Reflective

What is the unit of measurement for luminous flux?

• Lux

• Watt

• Candela

• Lumen

How does illuminance change with distance from a light source?

• It increases linearly

• It remains constant

• It increases with the square of the distance

• It decreases with the square of the distance

What is the relationship between luminous intensity and distance from the source?

• Directly proportional

• Inversely proportional to the square of the distance

• Unrelated

• Directly proportional to the square of the distance

What is the speed of light in a vacuum?

• 1.5 x 10^8 m/s

• 2 x 10^8 m/s

• 3 x 10^8 m/s

• 4 x 10^8 m/s