How does a prism split white light into a rainbow?

White light is a mix of all the colours that we know, from the violet to red, which means that is formed by a range of wavelengths (from 400nm to approximately 700nm). Where the colors violet and blue have a smaller wavelength and colors like red have a longer wavelength

Also, light travels at a different speed depending on the medium in which it is found, this is because of the index of refraction of the material.

In a prism, light will travel slower than in the air, and the different wavelengths travel at different speeds.

As light passes through the prism, light with a longer wavelength (red) travels faster than light with a shorter wavelength (violet) this speed difference causes light to break down into the color spectrum.

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

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