Tag: path of light

A yellow filter allows only yellow colour to pass through it. A leaf looks green because leaf reflects green colour and absorbs the rest. Thus, the yellow light passing through the filter will be absorbed by the green leaf. Thus, no colour will be reflected by the leaf making it appear black.

The path along which light travels is called a Ray.

1. Plane mirrors don't usually form real images They form virtual images of real objects. However, things can be arranged so that a plane mirror does form a real image. A convergent light beam can do this. So the answer is "convergent"

2. When at convergence point, a convergent beam of light is incident on the plane mirror, a real image is formed at the point

it selects the path that takes the least time.

The mirror is at 120 degrees to the x-axis. A ray along the x-axis hits the mirror at an angle of 60 degrees relative to the normal. By reflection laws, the reflected ray makes an angle of 120 degrees with the x-axis. The line equation is y = -sqrt(3)x + c. Testing the point (1, sqrt(3)) fits the geometric path.

When a red glass is heated to a high temperature it will glow with green light.

Objects can pnly be seen when light falls onto the object and is reflected back to our eyes to form an image on the retina.

A light ray is a narrow beam of light that is moving in a defined direction. Alternatively, a beam of light consists of lot of light rays parallel to each other.

We can only see objects when light falls into are eyes after being reflected from the objects.