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Because a reflection reverses the direction of the component of the wave vector of the light hitting the reflecting surface which is orthogonal to the surface. The component parallel to the surface will not change.
This means the light going towards a mirror, will go away from the mirror after reflection. But if it went from the left to the right, it will continue to go from the left to the right. Same with up and down.
In three dimensions this is the same as changing the handedness of the image.
What else can I help you with?
What is a similar plane figure?
It is a figure that is the same as another figure in the plane. A square is the same plane figure as another square, but a cube is same the same plane figure even tho it is made up of 6 squares.
Which plane figure has 8 sides?
An 8-sided plane figure is an octagon.
Which transformation is a flipping of a plane about a fixed line?
Reflection in the line.
What shape has a closed plane figure with at least three sides?
A three sided closed plane figure (shape) is a triangle.
Is a quadrilateral any plane figure with four straight sides?
A quadrilateral is a closed plane figure with four straight sides.
What changes the position or orientation of a figure on a coordinate plane?
This is a transformation which could be a rotation, translation or reflection.
What type of rotation will preserve the orientation of a h-shaped figure in the gird?
Rotation, in the plane of the grid, through 180 degrees.
What does a line reflection not preserve?
A reflection in a line l is a correspondence that pairs each point in the plane and not on the linewith point P' such that l is the perpendicular bisector of segment PP'. IF P is on l then P is paired with itself ... Under a reflection the image is laterally inverted. Thus reflection does NOT preserve orientation...
When a figure translates to the right or translates up on the coordinates plane?
reflection
What happens when you perform a translation of a figure?
It is moved across the plane. Its size or orientation are not changed.
What does transformation mean in geometry?
A transformation is moving or changing the shape of a figure on the Cartesian plane by a translation, by a reflection, by a rotation or by an enlargment
A figure is transformed in the plane such that no point maps to itself. What type of transformation?
It could be a reflection with the mirror line outside the figure; it could be a rotation with the centre of rotation outside the figure; or it could be a translation.
Where does an image in a plane mirror appear to be located?
An image in a plane mirror appears to be located behind the mirror at the same distance as the object is in front of the mirror. This creates the illusion that the image is a mirrored reflection of the object, with the same size and orientation.
What is a closed figure in a plane?
plane figure
Is a cube a plane figure or a solid figure?
No it is not a plane but it is a solidfigure
How do find the area of a plane figure?
Area of plane figure
Laws of reflection by a plane mirror?
angle of incidence is equal to angle of reflection.
