Which describes an image that a plane mirror can make? a. the image is always real. b. the image can be either virtual or real. c. the image is never right-side up. d. the image can only be the same size as the object.

B. The image can be either virtual or real.

Explanation:

A plane mirror is one in which the reflection surface is completely flat and generates an image that can be real or virtual. Plane mirrors have a wide range of uses, from home to mirror as components of sophisticated optical instruments.

To determine the image in a plane mirror, just imagine that the observer sees an object that appears to be behind the mirror. This is because the extension of the reflected ray passes through a virtual image point (PIV) "behind" the mirror.

In plane mirrors, the object and its image always have opposite natures, that is, when one is real the other must be virtual. Therefore, to obtain the image of a point object geometrically, it is enough to draw a straight line through it and symmetrically mark the image point.

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day