Question

- The range of wavelength of visible light is?
1- (10-100) \[{{A}^{0}}\]
2- (4000-7000) \[{{A}^{0}}\]
3-(8000-10000) \[{{A}^{0}}\]
4-(10000-15000) \[{{A}^{0}}\]

Answer 1

Hint: We need to find the wavelength of visible light. Light which falls in the visible region of the electromagnetic spectrum is visible to our naked eyes. Wavelength is one of the important characteristics of a wave.

Complete answer:
We know that white light consists of 7 lights and which can be obtained with the help of a prism. Also, since light is an electromagnetic wave and all electromagnetic waves travel with the speed of light, Also, all electromagnetic waves can be put in the electromagnetic spectrum in increasing order of their wavelength.
In general, the wavelength of light is of the range, 380 to 700 nanometers and we know 1 nm= 10\[{{A}^{0}}\],
Thus, the range of wavelength of visible light is about - (4000-7000) \[{{A}^{0}}\]

So, the correct answer is “Option 2”.

Additional Information:
Frequency can be defined as the number of oscillations in one second. It is the characteristic of the source and it remains constant throughout the motion of the wave. Contrary to this wavelength and velocity of the wave depends on the medium and changes.

Note:
The wavelength is dependent upon the frequency and the speed of the propagating wave. Frequency is the characteristic of the source which is producing the wave. The SI unit of the wavelength is metre and velocity of the wave is m/s while for the frequency it is to be taken in Hertz (hz) always.