A Tick the most appropriate answer.
The phenomenon by which the incident light falling on a surface is sent back into the same mediurn is known as
a lateral Inversion.
b. reflection
c polarization.
d. dispersion.
2. Which type of reflection will take place when light is incident on a highly polished surface?
a. regular
b. diffused
c. irregular
d. normal
3. A mirror that has a flat reflecting surface is called
a flat mirror
b. spherical mirror.
c. plane mirror
d. cylindrical mirror.
4. An imaginary line drawn perpendicular to the mirror at the point of incidence is called the
a. normal.
b. reflected ray.
c Incident ray.
d. refracted ray.
5. If the angle of incidence for a ray of light is 40°, then its angle of reflection will be
a 20⁰
b. 80°
c. 40°
d. 0°
6. If you stand 1 m in front of a plane mirror, how far away would you see yourself in the mirror?
a. 1 m
b. 2 m
c. 3 m
d. 4m
7. The word 'B' appears in a plane mirror as 'a' due to
a. reflection.
b. wrong positioning of the mirror.
c. lateral Inversion.
d. colour addition.
8. Which of the following is not a primary colour
a red
b. green
c black
d. blue
9. Which of the following combination of colour will produce white colour?
a. green + magenta
b. cyan + blue
c. yellow +
d red + green
10. A red rose when seen in blue light appears
a. red.
b. blue.
c. black.
d. green.
Answers
Answer
This phenomenon is called refraction of light. So, we see that, in case of both reflection and total internal reflection, the incident light falling on a surface is sent back into the same medium.
Regular reflection takes place from a smooth or a regular surface. In regular reflection, all reflected rays are parallel to each other for parallel incident rays. Irregular or diffused reflection takes place from an irregular surface.
A plane mirror is a mirror with a flat (planar) reflective surface.[1][2] For light rays striking a plane mirror, the angle of reflection equals the angle of incidence.[3] The angle of the incidence is the angle between the incident ray and the surface normal (an imaginary line perpendicular to the surface). Therefore, the angle of reflection is the angle between the reflected ray and the normal and a collimated beam of light does not spread out after reflection from a plane mirror, except for diffraction effects.
A plane mirror makes an image of objects in front of it; these images appear to be behind the plane in which the mirror lies. A straight line drawn from part of an object to the corresponding part of its image makes a right angle with, and is bisected by, the surface of the plane mirror. The image formed by a plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come. However, the image is a laterally-inverted "mirror image" of the object. If a person is reflected in a plane mirror, the image of his right hand appears to be the left hand of the image.
Plane mirrors are the only type of mirror for which a real object always produces an image that is virtual, erect and of the same size as the object. Virtual objects produce real images, however.[citation needed] The focal length of a plane mirror is infinity;[4] its optical power is zero. Preparation[edit]
A ray diagram for a plane mirror. The incident light rays from the object create an apparent mirror image for the observer.
A plane mirror is made using some highly reflecting and polished surface such as a silver or aluminum surface in a process called silvering.[5] After silvering, a thin layer of red lead oxide is applied at the back of the mirror. The reflecting surface reflects most of the light striking it as long as the surface a remains uncontaminated by tarnishing or oxidation. Most modern plane mirrors are designed with a thin piece of plate glass that protects and strengthens the mirror surface and helps prevent tarnishing. Historically, mirrors were simply flat pieces of polished copper, obsidian, brass, or a precious metal. Mirrors made from liquid also exist, as the elements gallium and mercury are both highly reflective in their liquid state.
Relation to curved mirrors[edit]
Mathematically, a plane mirror can be considered to be the limit of either a concave or a convex spherical curved mirror as the radius, and therefore the focal length, becomes infinite.[4] If we cut a spherical mirror in to small parts, then the focus of the small parts will not change because their center of curvature will not change. Now small parts are cut into much smaller parts and their focus will also remain same as of later one's. very much small part can act as a plain mirror and its focus will also be the same. Then why the focus of plain mirror is infinite
Answer:
1) reflection
2) regular
3) plane mirror
4) normal
5) 40 degree
6) same distance (1m)
7) lateral inversion
8) black
9)sorry I don't know
10) green