What is the SI unit of intensity?

The SI unit of intensity is Watt per square meter.

What is loudness and intensity?

Loudness refers to how loud or soft a sound seems to a listener. The loudness of sound is determined, in turn, by the intensity of the sound waves. Intensity is a measure of the amount of energy in sound waves.

Is candela a SI unit?

The candela is the base unit within the International System of Units (SI) that is used for such measurements of light.

What is SI unit of luminous intensity and electric current?

Candela is the SI unit of luminous intensity. Ampere is the SI unit of electric current.

What are the units of loudness?

dB, decibel – noise of sound measurement is called decibels (dB). Ratio of the sound pressure to reference pressure to something. sone – a unit of perceived loudness equal to the loudness of a 1000-hertz tone at 40 dB above threshold, starting with 1 sone.

What is loudness of sound class 9?

Loudness: Loudness is the response of ear to the sound. Loudness is proportional to the square of the amplitude of the vibration body producing sound. The more the amplitude of vibration, the sound is the loud. The lesser the amplitude of vibration, the sound is feeble.

What is Lux and candela?

The lux is the International System of Units unit for luminous emittance. It’s used to measure the apparent intensity of light as it strikes a surface. The candela is the International System of Units (SI) unit for luminous intensity. It measures the apparent intensity of a light source in a specific direction.

What is the symbol of SI unit of luminous intensity?

Luminous intensity typically is represented by the symbol Iν, where the subscript ν denotes a photometric quantity, and its unit is the candela, an SI base unit (1 cd = 1 lumen/steradian, where the steradian is a measure of solid angle). An antiquated term for the candela is candlepower.

What is the unit of loudness Class 8?

The loudness is expressed in a unit called decibel (dB). The more the amplitude of vibration, the sound is the loud.

What is loudness Ncert?