light

# Some objects like water and glass transmit light to

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: art as possible. They accomplish this by observing the apparent displacement of a star against the background of more distant stars resulting from the change of the Earth’s position in orbit. The parallax angle is exaggerated in the picture below. ≅ θ θ θ Parallax and Depth Perception (cont.) The picture is not to scale. The diameter of Earth’s orbit is very small compared to the distance of the star being measured, which in turn is very small compared to the distance of the background stars. For this reason the angular displacement of points A and B, as seen from Earth at any point in its orbit, is almost exactly the same as the parallax angle. Problem: Back on Earth Schmedrick attempts to figure out how far away a certain distant star is. He figures out a 2 degree parallax angle from two different observations made during the earth’s period. How far away is the star? (Earth 93 million miles from the sun.) Solution on next slide. A 2o B Parallax and Depth Perception (cont.)...
View Full Document

## This note was uploaded on 11/17/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

Ask a homework question - tutors are online