QUIZ 2 - Mirrors Flashcards
Virtual image
❌ light from source
❌ focused on screen
right side up
Real Image
✓ light from source
✓ focused on screen
inverted
Law of Reflection
∠ incidence = ∠ reflection
Mirror Equation
Magnification Equation
Focal length =
Plane mirrors:
Virtual, upright
SAME size
behind mirror
What is the length of a mirror needed to see an entire object?
1/2 of object height
Convex
Concave
The more curved the mirror is
the more blurry the image
The smaller the size of the mirror compared to the radius of curvature (r)
the more focused the image (rays will cross at a single point –> focus)
What kind of mirrors will reflect rays to a perfect focus?
parabolic mirrors
What are 4 rays to draw when doing mirror ray diagrams?
CONCAVE MIRROR
- Enter parallel → exit through F
- Enter through F → exit parallel
- Enter through C (perpendicular to mirror) → exit back on itself
- Enter incident at the optical axis → reflected back same angle
If image height (hi) +
upright image
image/object distance (di/do) +
image/object in front of mirror
Magnification +
upright image
Scenarios Concave Mirror
If: d0 > F
Real image
Scenarios Concave Mirror
If: d0 < F
Virtual image
Scenarios Concave Mirror
If: d0 = F
No image
Images from CONVEX mirrors are always?
virtual, upright, behind mirror
F = negative
1/do: +
1/di: –
4 Rays to draw for ray diagram CONVEX mirror
- Enters parallel → appears to exit coming from F
- Enters aimed at C → reflected back on itself
- Enters aimed at F → exits parallel
- Enters incident to optical axis → reflected back same angle
