Apassenger on an interplanetary express bus traveling at = 0.95 takes a 9.0-minute catnap, according to her watch. how long does her catnap from the vantage point of a fixed planet last?

28.82 minutes

Explanation:

This problem is an example of time dilatation by acceleration. The formula is:

is the time measured by the observer on a fixed position (in this case in the fixed planet), is the time measured by the person moving away from the fixed observer (the one on an interplanetary express bus), is the speed of light and the velocity of the observer that is moving away (the velocity of the ship).

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.