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Acids, Bases And Salts

Question

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Define a ray of light and a beam light. What are the different types of beams of light?

Solution

Ray of light: The direction or path along which, light energy travels in a medium is called a ray of light. It is represented by a straight line with an arrow marked on it.

Beam of light: A group of light rays is called a beam of light. A beam of light may be parallel, convergent or divergent.

The below figure shows us the diagram of divergent and convergent beam of light.

Divergent/ parallel beam of light: The rays from a distant light source (such as the sun) are parallel to each other and they constitute a parallel beam. The rays tend to proceed away from a point.

Convergent beam: rays proceed towards a particular point.

Some More Questions From Acids, Bases and Salts Chapter

What is an optical medium? How can we classify different media on the basis of their behaviour towards light?

What do you mean by reflection, refraction and absorption of light?

Which type of phenomenon (reflection or refraction) occurs when light falls on (i) a highly polished surface like a mirror and (ii) a transparent medium like glass or water?

What is meant by the optical image of an object?

What are real and virtual images? Can these images be obtained on a screen? Give reasons in support of your answer.

Give three points of differences between real and virtual images.

What is a mirror? Mention the different types of mirrors commonly used.

Define the following terms in connection with reflection of light:
Incident ray, reflected ray, point of incidence, normal, angle of incidence and angle of reflection.

State the laws of reflection of light.

Are the laws of reflection applicable to plane surfaces also valid for curved surfaces?

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