Lecture #1: Concept of Space & Time

Question 1

Who were 1st to move from faith-based to objective view of reality?

Answer 1

Greek Philosophers

Question 1

what distinguishes us from other creatures?

Answer 1

our power of thought

Question 2

who considered space as an entity in which things come to be and time as period of motion of heavenly bodies?

Answer 2

Plato

Question 3

who defined space as innermost motionless boundary of what contains time as a constant attribute of movement that cannot exist by itself but relative to the motion?

Answer 3

Aristotle

Question 4

Who discussed that the knowledge of time depends on knowledge of movement and therefore time cannot exist where there are no creatures to measure its passing. Also connected the space to the question of the creation

Answer 4

St.augustine

Question 5

Who believed that when the notion of time is combined with another
notion, the space, that allows one to understand knowledge through
sense, experiment and data, as opposed to pure reason

Answer 5

Immanuel Kant

Question 6

What is theologian’s view

Answer 6

An actual infinite cannot exist. The Universe must have a beginning, so must have the time.

Question 7

who proposed the concept of absolute Space and Time. In
this view, space and time were entities depending on themselves (eg. absolute space is needed to explain rotation and acceleration that do not depend on other objects)

Answer 7

Newton

Question 8

The in between two objects is NOT the space but the relation between them. If objects do not exist, space
has no meaning and motion is defined as the objects moving
w.r.t each other. also argued however, that space exists no
matter if objects exist or not and objects move with respect to
space.

Answer 8

Leibnitz

Question 9

What is Mach’s principle?

Answer 9

inertia results from relationship between an object with objects in the rest of the universe. Inertia is
caused by the interaction of different bodies in the Universe.

Question 10

What does principle of relativity say?

Answer 10

laws of physics are the same in all inertial systems.

Question 11

true or false: all motions are relative

Answer 11

true

Question 12

true or false: speed of light is not constant regardless to the frame w.r.t which it is measured

Answer 12

false

Question 13

With respect of what light is moving?

Answer 13

light move w.r.t everything around it regardless of the speed everything is moving

Question 14

What does equivalence principle state?

Answer 14

force felt by an observer in a gravitational field and in an accelerating frame are indistinguishable

Question 15

what are inertia, gravity, and acceleration associated with..

Answer 15

space time (the way space and time are related)

Question 16

what is concept of space and time associated with..

Answer 16

geometry and curvature

Question 17

true or false: law of physics has temporal dependence

Answer 17

false

Question 18

true or false: object in space can move in one direction

Answer 18

false (any)

Question 19

what do you call the disorder in a physical system?

Answer 19

entropy

Question 20

What is the curvature of space?

Answer 20

could be flat or have 0 curvature or curved away from itself or have negative curvature. (geometry varies w/ each curvature)

Question 21

What are the 2 concepts of mass?

Answer 21

inertial mass and gravitational mass

Question 22

what is gravitational mass?

Answer 22

property of an object that determines how strongly the object is pulled by force of gravity

Question 23

what is inertial mass?

Answer 23

property of an object that resists acceleration

Question 24

What does equivalence principle state about gravitational and inertial mass?

Answer 24

the gravitational and inertial mass of an object are the same quantities (amount)