The apparent shift in the position of an object when viewed from different angles is known as what?

The apparent shift in the position of an object when viewed from different angles is known as what?

• A. Parallax effect
• B. Refraction
• C. Doppler effect
• D. Interference

Answer: (A)

The apparent shift in position of an object when you view it from different angles is parallax. This happens because changing your viewpoint changes the line of sight to the object relative to faraway background points; the closer the object, the more noticeable the shift. A simple demonstration is holding your finger in front of your eye and switching which eye is open—the finger seems to jump against a distant background. In astronomy, parallax lets scientists estimate distances to nearby stars by tracking their positions against distant stars as the Earth travels around the Sun, creating a baseline of about 2 astronomical units. Refraction involves light bending when it enters a different medium, like a straw appearing bent in a glass of water; the Doppler effect is a change in frequency due to relative motion; interference refers to the pattern that results when waves overlap.

The apparent shift in position of an object when you view it from different angles is parallax. This happens because changing your viewpoint changes the line of sight to the object relative to faraway background points; the closer the object, the more noticeable the shift. A simple demonstration is holding your finger in front of your eye and switching which eye is open—the finger seems to jump against a distant background. In astronomy, parallax lets scientists estimate distances to nearby stars by tracking their positions against distant stars as the Earth travels around the Sun, creating a baseline of about 2 astronomical units. Refraction involves light bending when it enters a different medium, like a straw appearing bent in a glass of water; the Doppler effect is a change in frequency due to relative motion; interference refers to the pattern that results when waves overlap.