Exam 20: Light Color and Atmospheric Optics

How does the human eye perceive light? What would happen if humans only had rod-type receptors?

If a person sees a rainbow in the morning,they are facing west,toward the rain shower,and it is likely that the clouds and showers will move away from them.​

The length of twilight depends on ______.

Some people will remark that the "Sun appears to be drawing up water" when they are actually observing ____.

Occasionally,when the size of the suspended particles are similar to the primary wavelengths of visible light,the Sun can appear blue,even at noon.

You would most likely see a tangent arc with a ____.

A wet-looking road surface on a clear,hot,dry day is an example of ____.

Selective scattering is also known as ____________________.​

The sky is blue because air molecules selectively ____ blue light.

If people possessed rod-type receptors only,then only ____________________ vision would be possible.​

A ring of light encircling and extending outward from the Sun or Moon is called a(n)____________________.​

When the bright light beams appear to converge toward the part of the horizon opposite from the Sun,the beams of light are called ____________________ rays.​

What is a tangent arc in relation to a halo?​

A mirage is caused by ____.

For blue Suns to appear,the size of the suspended particles must be ____.

Without the atmosphere,there would be no refraction or scattering,and the Sun would rise later and set earlier than it now does.

How can volcanic eruptions cause red sunsets?​

Explain the following rhyme: Rainbow at morning,sailor take warning; Rainbow at night,sailor's delight.​

Haze can scatter light from the rising or setting Sun in a way that produces bright light beams,called anticrepuscular rays,radiating across the sky.

A star that is cooler than our Sun radiates most of its energy at slightly longer wavelengths;therefore,it appears ____________________.​