What mirror has a reflective surface that edges away from the observer?
Concave mirror
100
What is a real Image/Virtual Image?
Real- can be collected on a screen
Virtual can not be collected on a screen
100
What is specular and diffuse reflection, and what are the properties?
Specular Reflection- formed on smooth surface, the rays are in one direction and parallel
Diffuse Reflection- Formed on rough surface, rays are reflected randomly
100
A make-up mirror has a radius of curvature of 6 cm.
A pencil is placed 8 cm away from the mirror.
Is the image formed is real or virtual and upright or inverted.
A real image is formed and is inverted
200
What is the type of material that does not ALLOW ANY LIGHT to pass through?
Opeque
200
What is the reflective surface with the edges that curve towards the observer?
Convex mirror
200
What is the angle of incidents?
It is the angle between the ray that strikes the surface (incident ray) and the line perpendicular to the surface (normal) at the point of contact
200
What is the law of reflection?
angle of incidents = angle of reflection
200
A make-up mirror has radius of curvature of 10 cm.
What are the properties of the image formed?
No image is formed
300
What is the type of material that allows SOME light to pass through?
Translucent
300
What is the equation to find the focal length/radius
Radius= 2 focal length (R=2f)
f=R/2
300
What is the angle of reflection?
Angle formed by the reflection ray and normal
300
How can you tell if an image is virtual and real based on the Magnification?
If the Magnification is POSITIVE then the image formed is VIRTUAL and UPRIGHT
If the Magnification is NEGATIVE then the image formed is REAL and INVERTED
300
A concave mirror has a radius of curvature of 12 cm and a pencil is placed 11 cm from the mirror, what is the image distance and how did you find it?
A make-up mirror has a focal length of 12 cm, and a pencil is placed 3 cm from the mirror, what is the magnification? and state the equation used to find the answer
1) Image formed is a virtual image
2)Image size=Object size
3) Laterally inverted
4)Erect
5)Image distance=Object distance
6) line joining a point on the object to it's reflection is perpindicular
500
Compare and Contrast four (out of the five) properties of Concave and Convex Mirrors
Concave Convex
1)A mirror whose reflecting 1) A mirror whose
surface is the inside reflecting surface is the
of a circle outward of the sphere
2) Magnifies an image 2) Minimizes the image
3) Has real focus 3) Has virtual focus
4) Converging light rays 4) Diverging light rays
5) the image is inverted 5) The image is upright
and real except if it is (erect)
located between mirror
and focal point
500
How do you Draw the Rays formed (chose 2 of the 3)
Ray 1- Draw a line from object to mirror that is parallel to the principal axis then when it reaches the mirror draw a line through the focal point (F)
Ray 2- Draw a line from object to mirror through the center of curvature (C) and it is reflected back along itself through C
Ray 3- Draw a line from object to focal point (F) and when it reaches the mirror draw the line parallel to the principal axis
A shaving mirror has a radius of 30 cm and an object (with a height of 12 cm) is placed 20 cm away from the concave mirror, what is the magnification of the image formed ( worth 1500 points)