Exploring Light

What is the speed of light in a vacuum?

• 300,000,000 meters per second

• 250,000,000 meters per second

• 299,792,457 meters per second

• 299,792,458 meters per second

What is the primary source of light on Earth?

• Fire

• Sun

• Stars

• Moon

What is the phenomenon where light changes direction when passing from one medium to another?

• Diffraction

• Reflection

• Refraction

• Absorption

What type of electromagnetic radiation has a shorter wavelength than visible light?

• Infrared, Microwave, Radio-wave radiation

• Visible light, Ultraviolet, Infrared radiation

• X-ray, Gamma-ray, Radio-wave radiation

• Ultraviolet, X-ray, and gamma-ray radiation

What is the unit of measurement for the brightness of light?

• watt

• lux

• lumen

• candela

What is the color of an object that reflects all light wavelengths?

• Yellow

• White

• Black

• Purple

What is the process by which light is produced in a light bulb?

• Bioluminescence

• Thermal radiation

• Chemiluminescence

• Incandescence

What is the bending of light waves around obstacles called?

• Reflection

• Refraction

• Diffraction

• Absorption

What is the name of the device that separates white light into its component colors?

• mirror

• lens

• prism

• filter

What is the term for the angle at which light is reflected from a surface?

• angle of refraction

• angle of incidence

• angle of reflection

• angle of deflection