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There are five sense organs in the human body. Out of which the work of eyes and ears are very important. But ever anyone thinks that these organs will be useless if there is no light and sound, without light we cannot see anything and what is the work of our ears if there will be no noise. Thus, sound and light play a very significant role in the human world, without them people can’t do any work. The sound and light are a source of information, as without light human eyes can’t see and read and without sound, there will be nothing for human ears to listen. So light and sound play a fundamental role in human life. Lights on one side brighten our life while sound fills our life with joyousness. Lights are used so essential that without it we cannot see, our houses will be dark without it, we cannot read, study, eat, we can do nothing without light. Light cram our life with happiness and makes our life shining and brightening. Similarly sound too makes our life full of noises and music. With the presence of sound only we can communicate with others and share our feelings. Sound is produced by vibrating objects and these vibrations produced enormous music, tunes and different type of sounds. Thus, sound and light fill our lives with joy and enthusiasm.

Light and sound from the perspective of science

Both light and sound are a form of energy but each has its speed level. As the sound and the light both are a form of the wave but light travel at a much faster speed than the speed of the light. In physics, it is said that light travels million times faster than the speed of the sound instead of light is the fastest wave among all types of waves. The light can travel anywhere it doesn’t require a medium of travelling as light can travel in a vacuum while sound requires a travelling medium like air and water. The science defines light as the electromagnetic radiation while the sound is the vibration that travels through air, water and solid objects. Light and sound both are waves, light is a transverse electromagnetic wave while the sound is a longitudinal wave. Scientist all around the world uses these two waves in much scientific research and development. Both light and sound are very crucial and both have an enormous number of uses as human explores the world through there seeing and hearing senses.

Uses of light

In science, light is defined as the transverse wave and is a form of kinetic energy. In our day to day life, we know how useful lights are in our life as it brightens our life. The light plays a very important role in human life. Light makes all the things and objects around humans visible and make them explore the various colours of the world. Our eyes are useless without light as only because of the presence of light we can see the world. The natural provide the biggest source of light and that is the sun. The sun is the ultimate source of light. The sunlight is very essential for living-organisms survival as without sunlight the photosynthesis process doesn’t take place and if this food process of plants does not take place then oxygen will not be formed. Thus, directly or indirectly light from the sun is very crucial for humans.

The light from the sun can also be used to produce solar energy that is an alternative and renewable eco- friendly source of electric energy. As the light is produced through hot objects and one such light-producing object is the laser and lasers because of their bright light is used for various purposes like in a computer, in medicines and the industries and factory production.

Lights are also considered as the symbol of happiness and light is used for decorating purposes also. Whether it is a decoration for the wedding ceremony, for festivities, or in big malls or complexes, light plays an important role in making things beautiful. Festivals like Diwali cannot be celebrated without light and people show their joyousness in Diwali by lighting Dias, firecrackers and decorating their houses with innovative light. Lights have become a significant part of interior designing and in interior decoration and markets are full of lightening accessories and decorating materials like lighting candles, attractive lamps, glass chandeliers, and many such beautiful lightening decorating pieces are used to decorate houses, malls and banquet halls. Thus, uses of lights are enormous in our lives.

Lightening also plays a significant role in sports events and stadiums. Even lights are necessary for organising events like schools functions, dancing shows and in the shooting of films and daily soaps. Without proper lightening in studios shooting can’t be done. Lights in transporting vehicles are also very necessary to avoid accidents. Wherever we go whether in houses, in offices, in railways or metro and even in-car, light is necessary everywhere as it makes objects visible to human eyes.

Uses of sound

In scientific terms, the sound is a longitudinal wave that requires a medium of travelling. Sounds in our daily lives is very essential as it fills our lives with joyousness and happiness through different forms of sounds. Sounds always surrounds us. As due to the presence of sound only we can hear otherwise if sound and noises are not present then our ears are of no use. Thus it sounds are very necessary and relevant in everyone’s lives.

Sounds uses can be trace firstly in the music industry. Endless numbers of songs and music are created only because sound energy makes it possible. It is recommended by the doctors that listening to music helps to lower the stress levels and reduces the chances of depression. And music is completely based on the sound that is produced from the musical instruments and the mouth of the singer. Even the dance industry too is incomplete without music and sounds as dance can be done only on music and on tunes of various musical instruments.

Sounds helps us to communicate with others and to deliver our feelings as well as to listen, another person. Through sound only we can communicate with our pets and various other animals. All animals have their distinct sounds and through their different sounds, we can differentiate them.

Sound as ultrasonic waves can be used in hospital purposes like for doing ultrasounds tests, to treat cancer and other deadly diseases, and in industries, ultrasound is used to measure the thickness of metal and other objects. In schools, an alarming bell’s sound helps to declare the scheduled timetable. In shooting studios and theatres, the sound is essential. Even at the road, car’s horn to traffic police’s whistle the presence of sound is everywhere.

Sounds is also consider as a celebrating symbol. All events have their particular type of sounds according to the nature of the occasion like birthday sounds, weddings sounds, spiritual sounds and many more. Different sounds, tunes and music convey our feelings and become a part of our important life events. Sounds are important and its significance cannot be ignored.


Sound and light both are a form of energy and are waves. Light is sound are very important and without them, we cannot explore the world. Although both are different with their properties and value. Our eyes and ears are working because of these two waves. The sound makes us hear while light makes us see. Thus, both are valuable for all human. There are various objects and things which are useless without sound and light. One such example is Television which is of no use if it doesn’t have sound and pictures that comes with the light. Films in theatres cannot be released if there will no sound and light. Sound and light are also used for presenting PowerPoint Presentations in offices, in smartboard in schools, and without these two all celebrations are incomplete as we use crackers in Diwali and weddings which look beautiful only because of their light and sound.

Lights in today’s time are used for enormous purposes and its scope in various fields is increasing. Lights play a very important role in interior decoration as various types of lamps, decorated lightening materials and showpieces are the most preferred decorating houses materials. On the other side, the sound is necessary for various spheres of life. A dance performance is possible only due to the presence of suitable music and due to the sounds of various musical instruments. Music of soothing and relaxing sound tunes has the power to change our alter mood and also helps to distress our mind.

Thus these two sound and light both are very essential and very relevant in our lives. Without these two a human life is not possible. These two are the basic principled objects of living a decent and comfortable life.