Uses of plane mirrors for security and safety Mirrors are used while looking for explosives underneath a vehicle. Even these mirrors are used in shops to keep an eye on the customers. Mirrors are also used in blind turns of busy roads to see the vehicles coming from other side.

The man is twice as tall as the distance between points X and Y. In other words, to view an image of yourself in a plane mirror, you will need an amount of mirror equal to one-half of your height. A 6-foot tall man needs 3-feet of mirror (positioned properly) in order to view his entire image.

We cannot see our image in a white sheet of paper because white pieces of paper have a rough surface that means diffused reflection takes place. These multiple reflections scatter the reflecting rays of the image, and we lost the image.

The focal length of a plane mirror is infinity; its optical power is zero.

Uses of plane mirrors are:–

• Used in periscopes for signalling .
• In kaleidoscopes to see round dangerous bend.
• In SLR camera to click photos.
• Car wing mirrors to view vehicles at behind and side that is to view traffic behind.
• In microscopes as reflecting plates.

Optical power is the degree to which a lens, mirror, or other optical system converges or diverges light. It is equal to the reciprocal of the focal length of the device. Power is the reciprocal of focal length.

Firstly, consider a point source placed at the focal point of a concave mirror. The initial vergence is then Vi = -1/f. The power of the surface is P = +1/f.

For mirror, mathematically power is. p=−1f. So the focal length of the concave mirror is negative. So, power for a concave mirror is positive.

Mirrors also reflect the positive energy of beautiful objects. Depending on how you use them, mirrors can activate and deflect different energies and let you multiply different elements around your house. One example of that would be to hang a mirror where it reflects a pretty view, thus multiplying the view.

Most experts also say that a mirror facing the bed depletes your personal energy and creates sleeplessness. Because the mirror doubles and bounces all sorts of energy, it disrupts the tranquility needed in a bedroom for better sleep.

According to feng shui, if you aren’t sleeping well, a mirror in your bedroom could be the culprit. Mirrors are thought to bounce energy around the bedroom, which may result in restlessness and amplify worries. It’s especially important not to hang a mirror on the wall opposite your bed.

Mirrors should always be placed on the eastern and northern walls of the house and never on southern or western walls.

But if you stare too long, you may fall into mirror illusion and self-consciousness. You may start thinking more about your looks. Interestingly, the viewer may feel hallucination also when staring too long. From the perspective of psychology, it’s not a good practice to stare too long in the mirror.

WHERE TO HANG A MIRROR. In a living room with southern exposure, you’ll want to make the most of cozy afternoon light, so place the mirror on the wall opposite the window, advises Going. If it’s a bedroom, or somewhere you want to capitalize on morning light, try the adjacent window.

a. the size of the images is half the size of the object. the distance of the object from the lens is equal to two times the images distance from the lens. …

The word distance means how far the object moves regardless of direction. It is always positive and is equal to the absolute value, or magnitude, of the displacement.

In position and time graphs, the slope of line indicates the velocity. Therefore negative slope of a position-time graph actually indicates negative velocity. Negative velocity is defined as the velocity of the object moving in an opposite direction.