What Scientific Method Is Used to Observe the Pulsation in Size

question 20

Multiple Choice

What scientific method is used to observe the pulsation in size of a Cepheid variable star?

• A) This behavior has only been predicted theoretically; it has never been detected.
• B) observed perturbations in the orbits of planets around the star
• C) observed increase and decrease in the size of the star's image
• D) Doppler shift of absorption lines in the star's spectrum

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Definitions:

Farm Scene

A farm scene typically depicts a rural setting dedicated to agriculture and livestock management, often used in educational contexts to teach children about farming practices.

Perspective

A particular attitude towards or way of regarding something; a point of view.

Appearance

The way that someone or something looks from the outside, including physical characteristics and style.

Reality

The state of things as they actually exist, as opposed to an idealistic or notional idea of them.