ᴄᴏɴᴄᴀᴠᴇ ᴀɴᴅ ᴄᴏɴᴠᴇx ᴍɪʀʀᴏʀs

                25 - 27

size and distances of objects and images are no longer

equal, images appear warped

many small plane mirrors connected together, each to
slightly different angle

still apply laws of reflection

normal to surface is different at every point

╓═══════☆═══════╖

          Concave Mirrors

╙═══════☆═══════╜

concave mirror - reflective surface curves inward, away 
from incident light

reflect incoming parallel light rays inward toward single
point called focal point, which lies along principal axis

focal strength - distance from surface to focal point 
abbreviated to f

produce different types of images depending on position of
object relative to mirror

objects between mirror & focal point - image is virtual,
upright, magnified

object outside focal point - image is real and inverted

farther away = light rays arrive at mirror very nearly 
parallel, image formed very close to focal point

useful for seeing enlarged reflections of face

solar cookers use to focus sunlight at specific point

useful for projecting rays straight out from light source

flashlights, car headlights

used in construction of optical cavities

╓═══════☆═══════╖

          Convex Mirrors

╙═══════☆═══════╜

convex mirror - reflective surface curves out

focal point on opposite side of mirror from object

reflect light outward, cannot be used to focus light

images always virtual, upright, reduced (smaller)

object gets larger as it approaches mirror

same size when in contact with mirror

"objects in mirror are closer than they appear"

required by law to be etched on passenger side mirros

mounted on large buildings to see around hallway corners

mounted along highways with reduced visibility or blind spots

concave mirrors made from blown glass used in 15c

more common than plane mirrors, glass blowing is curved