Define a ray of fight.

What is a ray of light?

What is a ray of light?

The direction of ray of light incident on a concave mirror is shown by PQ while directions in which the ray would travel after reflection is shown by four rays marked 1,2,3 and 4 (Fig. EP 9.8). Which of the four rays correctly shows the direction of reflected ray?

Draw a ray diagra to show refraction of a ray of monochromatic light passing through a glass prism.

Define decay constant of a radioactive sample. Which of the following radiations, alpha-rays, beta -rays, gamma -rays are similar to X-rays?

Define decay constant of a radioactive sample. Which of the following radiations, alpha-rays, beta -rays, gamma -rays are similar in nature to cathode rays?

Define decay constant of a radioactive sample. Which of the following radiations, alpha-rays, beta -rays, gamma -rays are easily absorbed by matter?