Wavelength and Color: Understanding Visible Light and the Electromagnetic Spectrum

The video explores the visible light portion of the electromagnetic spectrum, explaining how it is sandwiched between ultraviolet and infrared light. It discusses the continuous spectrum of colors, the scattering of sunlight by Earth's atmosphere, and how this affects the sun's appearance at different times of the day. The concept of refraction is introduced, showing how white light can be split into its constituent colors using a prism. Different light sources and their emission spectra are also covered.

Which part of the electromagnetic spectrum is visible light located between?

• Ultraviolet light and infrared radiation

• Microwaves and radio waves

• Gamma rays and X-rays

• X-rays and ultraviolet light

What causes the sun to appear yellow during the day?

• Longer wavelengths are absorbed by the atmosphere

• The sun emits only yellow light

• Shorter wavelengths are scattered more by the atmosphere

• The sun is closer to the Earth

Why does the sun appear red or orange during sunset?

• The Earth's rotation changes the sun's color

• The atmosphere scatters shorter wavelengths more

• Shorter wavelengths are scattered less

• The sun emits more red light in the evening

What is refraction?

• The bending of light as it passes through a prism

• The scattering of light by the atmosphere

• The absorption of light by a medium

• The reflection of light off a surface

How does a prism affect white light?

• It scatters light in all directions

• It splits white light into its constituent colors

• It reflects all colors equally

• It absorbs all colors except red

Which color of light refracts the most when passing through a prism?

• Red

• Violet

• Green

• Blue

What type of light sources emit narrow ranges of wavelengths?

• Filament lamps

• Neon signs

• The sun

• Stars