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Difference between a real and virtual image

Real image Virtual image A real image is formed due to actual intersection of the reflected rays. A virtual image is formed when the reflected rays meet if they are produced backwards. A real image can be obtained on a screen. A virtual image cannot be . . .

What is Human Eye?

The human eye is one of the most valuable and sensitive sense organs. It enables us to see the wonderful world and the colours around us. On closing the eyes, we can identify objects to some extent by their smell, taste, sound they make or by touch. It is, however to impossible to identify colours while closing the eyes. Thus, of all the sense organs, t . . .

Colour coding of electric wires in a cable

For convenience live, neutral and earth wire are provided with different colours. According to old convention of colour coding, live wire is red, neutral wire is black and earth wire is green in colour. How-ever in new international convention the respective colours for three wires are brown, light blue and green. . . .

Electrical energy and power

The flow of electric current in any circuit causes electric energy. Like, an electric bulb converts electrical energy into light energy, Electric fan converts electric energy into mechanical energy, Radio set converts electrical energy into sound energy. Electrical energy: We know that work done in flowing the charge q through a conductor having p . . .

Trigonometric ratios

Relations between different trigonometrical ratios: Trigonometrical ratios of complementary angles: . . .

Energy in different forms

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Different forms of Energy

SOLAR ENERGY: The energy radiated from sun is called the solar energy. Energy of sun is due to fusion of hydrogen nuclei into helium. The earth receives only a billion part of total energy from sun. Plants use solar energy to make food for themselves. This process is called photosynthesis. However, one can store this energy through solar cells. Li . . .

Effects of a Force

EFFECTS OF A FORCE The application of force can cause the following effects: It can start or stop the motion. It can change the speed or the direction of the motion or both. It can change the size and shape of the body. UNITS OF FORCE According to newton’s second law force is defined as the product of mass of the body and . . .

Specific latent heat of fusion-

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Question: The difference between the exterior angles of two regular polygons, having the sides equal to (n-1) and (n+1) is 9°. Find the value of n.

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Q- Write the meaning of the Proxemics.

Proxemics- Use of interpersonal space (space between the communicator and the communicate) in communication is known as proxemics. When two persons purposefully maintain the distance between themwhile speaking to each other, it has a meaning. Proxemics is an important part of non-verbal communication and it is modifies the spoken word.  &nb . . .

Q- Write the meaning of the paralanguage.

Paralanguage- Paralanguage refers to verbalized ways of non-verbal communication. It consists of voice quality, voice volume, pitch of voice, rate of speech, vocal intonations, non-fluencies (saying ah, um, uh, oh, etc.). . . .

Q- Write the meaning of the body language.

1)- Body Language- Body language or kinesics means study of body movement. It consist two element.  A)- Body language or Kinetics-  Different parts of our body can convey message effectively. Like- facial expressions eye contacts, nodding and shaking of head, moving hands, raising figure.               . . .

Q- Explain the main form of non-verbal communication.

Body Language Paralanguage Proxemics Visual Communication Aural Communication . . .

What are consumer products and their types.

A consumer product is any tangible product for sale that is used by a person or household for non-business purposes. There are  4 types of consumer products. 4 Types of Consumer Products Convenience products. Shopping products. Specialty products. Unsought products.   . . .

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