What are the three types of reflection?
Reflection is divided into three types: diffuse, specular, and glossy.
What is the 1st law of reflection?
First law of reflection: According to the first law, the incident ray, reflected ray and normal, all lie in the same plane. Second law of reflection: According to the second law, the angle of reflection is always equal to the angle of incidence. This ray of light will be reflected back along the same path.
How do you write a reflective reading?
When writing a reflection paper on literature or another experience, the point is to include your thoughts and reactions to the reading or experience. You can present what you observed (objective discussion) and how what you experienced or saw made you feel and explain why (subjective discussion).
What are the 4 reflection rules?
Reflection on a Coordinate Plane
- Reflection Over X Axis. When reflecting over (across) the x-axis, we keep x the same, but make y negative.
- Reflection Over Y Axis. When reflecting over (across) the y-axis, we keep y the same, but make x-negative.
- Reflection Across Y=X.
- Reflection Across Y=-X.
What are the two rules of reflection?
Laws of reflection are: (i) The incident ray, the reflected ray and the normal ray at the point of incidence, lie in the same plane. (ii) The angle of incidence is equal to the angle of reflection.
How do you reflect a shape?
Reflecting a shape simply means to flip it over a mirror line. Each point in the shape is moved to the other side of the mirror line but remains the same distance away from the line. The reflected image will now be facing in the opposite direction to the original object.
How do you find reflection?
Performing reflections The line of reflection is usually given in the form y = m x + b y = mx + b y=mx+by, equals, m, x, plus, b. How do I draw the line of reflection? Each point in the starting figure is the same perpendicular distance from the line of reflection as its corresponding point in the image.
What does it mean to reflect a shape?
Reflection – of a polygon A transformation where each point in a shape appears at an equal distance on the opposite side of a given line – the line of reflection. Every point on the original triangle is “reflected” in the mirror and appears on the right side an equal distance from the line.
What does a rotation look like?
A rotation is a transformation that turns the figure in either a clockwise or counterclockwise direction. You can turn a figure 90°, a quarter turn, either clockwise or counterclockwise. When you spin the figure exactly halfway, you have rotated it 180°.
What are the rules for clockwise rotations?
Terms in this set (9)
- (-y, x) 90 degree rotation counterclockwise around the origin.
- (y, -x) 90 degree rotation clockwise about the origin.
- (-x, -y) 180 degree rotation clockwise and counterclockwise about the origin.
- (-y, x) 270 degree rotation clockwise about the origin.
- (y, -x)
- (x, -y)
- (-x, y)
- (y, x)
What is the formula for a 90 degree clockwise rotation?
Rotation by 90° about the origin: A rotation by 90° about the origin is shown. The rule for a rotation by 90° about the origin is (x,y)→(−y,x) .
What does a 90 degree clockwise rotation look like?
Rotation of point through 90° about the origin in clockwise direction when point M (h, k) is rotated about the origin O through 90° in clockwise direction. The new position of point M (h, k) will become M’ (k, -h).
What effect will a 90 degree clockwise rotation have on the triangle?
The triangle will just be rotated, it will still be congruent to the triangle before it was rotated.
What is the same as a 180 degree clockwise rotation?
Rotation of a point through 180°, about the origin when a point M (h, k) is rotated about the origin O through 180° in anticlockwise or clockwise direction, it takes the new position M’ (-h, -k). …
Is clockwise open or close?
Clockwise means moving in the direction of the hands on a clock. Most screws and bolts are tightened, and faucets/taps are closed, by turning clockwise.
Is clockwise rotation positive or negative?
Counterclockwise is the positive rotation direction and clockwise is the negative direction. For example, a torque that rotates an object counterclockwise is a positive torque (see figure 6 below).
Why is a clockwise rotation negative?
If the rotation is clockwise, the angle has a negative measure. An angle in standard position is said to lie in the quadrant where the terminal side resides. One way to measure an angle is in degrees. Two or more angles in standard position can share the same terminal side and have different degree measures.
What is the default direction of a rotation?
assume the center of rotation to be the origin unless told otherwise. assume a positive angle of rotation turns the figure counterclockwise, and a negative angle turns the figure clockwise (unless told otherwise).
Are clockwise moments positive?
Moments are a measure of the turning effect of a force around a specified turning point or pivot. The direction of a moment is opposite to the direction of the force. The convention is that: clockwise moments are positive.
Is it possible to have a negative moment?
Turning moment is calculated with respect to the force applied and distance from the point about which turning is to take place. So now as we can see that both force and distance can either be positive or zero but they can never be negative so moment CANNOT BE NEGATIVE. So moment CAN BE ZERO.