We Receive a Radio Message from a Civilization Around a Star

question 24

Multiple Choice

We receive a radio message from a civilization around a star about 40 lightyears from Earth? If we reply right away, how long will it be between the time THEY sent the message and the time they receive our reply?

• A) 40 years
• B) 80 years
• C) 400 years
• D) 20 years
• E) it depends on the speed of the radio wave; so it can't be calculated from the information given

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Definitions:

Tenancy In Common

A form of co-ownership where each owner holds an individual, undivided interest in the property, and there is no right of survivorship.

Community Property

A form of joint property ownership typically between spouses in which assets acquired during marriage are owned equally.

Joint Tenancy

A form of property ownership in which two or more individuals hold equal shares and rights; upon the death of one tenant, their share automatically transfers to the surviving tenant(s).

Life Tenant

An individual who has the right to use and benefit from property during their lifetime, after which the property passes to another designated party.