Phase or phases may refer to:
Refers to the periods of time during which a planet's surface reflects different amounts of sunlight, revealing different portions of the planet's surface from the perspective of a given point in space.
The two inferior planets, Mercury and Venus, which have orbits that are smaller than the Earth's, exhibit the full range of phases as does the Moon, when seen through a telescope. Their phases are "full" when they are at superior conjunction, on the far side of the Sun as seen from the Earth. (It is possible to see them at these times, since their orbits are not exactly in the plane of Earth's orbit, so they usually appear to pass slightly above or below the Sun in the sky. Seeing them from the Earth's surface is difficult, because of sunlight scattered in Earth's atmosphere, but observers in space can see them easily if direct sunlight is blocked from reaching the observer's eyes.) The planets' phases are "new" when they are at inferior conjunction, passing more or less between the Sun and the Earth. (Sometimes they appear to cross the solar disk, which is called a transit of the planet.) At intermediate points on their orbits, these planets exhibit the full range of crescent and gibbous phases.
Phase in sinusoidal functions or in waves has two different, but closely related, meanings. One is the initial angle of a sinusoidal function at its origin and is sometimes called phase offset or phase difference. Another usage is the fraction of the wave cycle that has elapsed relative to the origin.
The phase of an oscillation or wave refers to a sinusoidal function such as the following:
where ,
, and
are constant parameters called the amplitude, frequency, and phase of the sinusoid. These functions are periodic with period
, and they are identical except for a displacement of
along the
axis. The term phase can refer to several different things:
The light is dead in your eye
So I'll keep living my life
I only wanted to try
To find my way back inside
My imitation of life
My litigation of life
It's something easy to find
Inside the shade of your eye
Out of the ground I rise to grace
Nobody knows it's just a phase
Help me I'm out of breath again
Nobody knows somewhere to make it go away
Phase
I find it hard to decide
The way to make up your mind
Your lips are better than mine
So you can kiss this goodbye
My imitation of life
My litigation of life
It's something easy to find
Inside the shade of your eye
It's just a phase
And I can't wait
Phase
I know
It's just a fucking phase
It's just a fucking phase
I'm drained time to fake and delay
Watch the penny drop
Let it go up and in drop
Then watch it roll
Let's all mourn till