Light is a form of electromagnetic radiation that is visible to the human eye. It is the primary source of information for sight and is essential for many aspects of life, including photosynthesis, navigation, and communication. Light travels through space at a speed of approximately 299,792 kilometers per second, and can be produced by a variety of sources, including the sun, light bulbs, and fireflies. Light can also be described in terms of its wavelength, frequency, and energy, and is commonly divided into different colors based on its wavelength. The colors of the rainbow, for example, are a result of the different wavelengths of visible light being separated and observed individually. Light is also used in a variety of applications, such as photography, fiber optics, and lasers.
Here are some MCQs on Light:
1. What is the speed of light in a vacuum?
a) 299,792,458 m/s
b) 186,000 km/s
c) 1,079,252,848.8 km/h
d) 4,336,998,240.1 km/h
2. What is the scientific term for the study of light?
a) Optics
b) Photonics
c) Radiometry
d) Illumination
3. Which color of light has the longest wavelength?
a) Red
b) Green
c) Blue
d) Violet
4. Which color of light has the shortest wavelength?
a) Red
b) Green
c) Blue
d) Violet
5. Which type of electromagnetic radiation has the shortest wavelength?
a) Radio waves
b) Microwaves
c) X-rays
d) Gamma rays
