Gravitational Lensing: Summarize the Observational Evidence That a Gravitational Field

question 13

Essay

Gravitational Lensing: Summarize the observational evidence that a gravitational field can deflect the path of light. In figures such as 18.7 on page 467, how would you prove to a skeptic that the distorted images indicated by the arrows are indeed multiple images of a single gravitationally- lensed galaxy? Muster as much observational evidence as you can.

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Definitions:

SHIFT+RIGHT ARROW

SHIFT+RIGHT ARROW is a keyboard shortcut used to extend text selection to the right, one character at a time.

CTRL+SHIFT+DOWN ARROW

A keyboard shortcut commonly used in spreadsheet and text editing software to select all cells from the current position down to the last non-empty cell in the column.

Neutrality

The state of not supporting or helping either side in a conflict, disagreement, etc.; impartiality.

Gray

A color resulting from the combination of black and white, existing in various shades from dark to light.