General Science Online Quiz Test

The major difference between laser light and other light sources (such as a light bulb) is that laser light is monochromatic, directional and coherent. Monochromatic means that all of the light produced by the laser is of the same frequency, amplitude and phase.

As per WHO The standard audible capacity of a healthy human being is in the range of 45-50 decibels. Humans can hear sounds between 0 and 180 decibels. To be precise, noise becomes harmful when it exceeds 75 decibels (dB) and is painful above 120 dB.

A communications satellite's transponder is the series of interconnected units that form a communications channel between the receiving and the transmitting antennas. It is mainly used in communication satellite to receives signals from an earth station and transmits them to different directions.

The gas used for filling weather balloons is helium. Hydrogen is lighter than air and can be used in filling air balloons but due to its highly inflammable nature, it is not used in air balloons.

Radioactive elements are made up of atoms whose nuclei are unstable and give off atomic radiation as part of a process of attaining stability. Uranium, Radium, Polonium, Thorium, etc are common radioactive elements. Zirconium is non-radioactive element.

The gas that is used in the manufacture of vanaspati ghee is hydrogen. Hydrogenation is a process where manufacturers add hydrogen to a liquid fat, such as vegetable oil, to turn it into a solid fat at room temperature.

Photoperiodism (Photo means light and period means length of time) affects Vegetative growth, Flowering and Fruiting. Photoperiodism is the developmental responses of plants to the relative lengths of light and dark periods. It affects the vegetative growth as well as the time of flowering and fruiting in plants.

It is the nerve tissue where no cell division occurs after birth. Cell division is the process by which a parent cell divides into two daughter cells with the same genetic material. There are two types of cell division: mitosis and meiosis. There is absence of centrioles in the nerve cells and because of this they are unable to perform mitosis and meiosis and hence these cells do not divide.

The medical term used for sleeplessness is Insomnia. It is a common sleep disorder that can make it hard to fall asleep, hard to stay asleep or cause to wake up too early and not be able to get back to sleep.

Nepenthes is an insect-catching plant. It is a genus of carnivorous plants, also known as tropical pitcher plants, or monkey cups, in the monotypic family Nepenthaceae.