Observer in a sentence

According to phenomenalism, to say that a normal observer is present is to make the hypothetical statement that were a doctor to inspect the observer, the observer would appear to the doctor to be normal.

A total eclipse occurs when the observer is within the umbra, an annular eclipse when the observer is within the antumbra, and a partial eclipse when the observer is within the penumbra.

Other observer teams are supposed to be present, including local observers, and international observers, such as the Carter Center, the Commonwealth, the OAS and a Caricom observer team.

The Election Commission on January 31 had appointed former IRS officer B Murli Kumar as special expenditure observer and ex-IPS officer Mrinal Kanti Das as special police observer for the Delhi polls.

Das again came to Baripada Thursday accompanied by former party observer of the district Sanjay Das Burma and assistant observer and MLA (Bhubaneswar, North) Sushant Rout.

For all the details on the event, look at this week’s print edition of the Bristol Observer or check out our e-edition, accessible from the Observer home page.

Threats were also emailed to locations in New York City and Atlanta; the Charlotte News & Observer and the Raleigh News & Observer newspapers in North Carolina; and three sites in Miami.

Aberration causes objects to appear to be angled or tilted towards the direction of motion of the observer compared to when the observer is stationary.

A change in coordinate system used by the observer is only a change in their description of observations, and does not mean that the observer has changed their state of motion, and vice versa.

An observation or measurement of an object by an observer is modeled by applying the wave equation to the entire system comprising the observer and the object.

A quantum mechanical state being a summary of the observer's information about an individual physical system changes both by dynamical laws, and whenever the observer acquires new information about the system through the process of measurement.

By traveling, an observer can come into contact with a greater region of spacetime than an observer who remains still.

Consider the case of an observer and a light source moving relative to each other at constant velocity, with a light beam moving from the source to the observer.

Conversely, if the source of waves is moving away from the observer, each wave is emitted from a position farther from the observer than the previous wave, so the arrival time between successive waves is increased, reducing the frequency.

For a system of two or more particles, none of the particles are required be at rest with respect to the observer for the system as a whole to be at rest with respect to the observer.

For example, a bullet passing an observer has kinetic energy in the reference frame of this observer.

For example, he says that size is not a quality of an object because the size of the object depends on the distance between the observer and the object, or the size of the observer.

He knew that this is because in the then-current models the Moon circles the center of the Earth, but the observer is at the surface—the Moon, Earth and observer form a triangle with a sharp angle that changes all the time.

However, in the relativistic description the observability of events is absolute: the movements of the observer do not influence whether an event passes the " light cone " of the observer.

Moreover, an observer will measure a moving clock to tick more slowly than one that is stationary with respect to them; and objects are measured to be shortened in the direction that they are moving with respect to the observer.