The world seems blue to an astronaut aboard a spaceship

The highest scattering by the air molecules present in the earth's atmosphere in the white light of the sun is for blue colour.

Because the size of the smoke particles is larger than the wavelength of the light, it looks white. White light is a combination of several wavelengths, yet they all scatter to the same amount...

Dust particles are contained in the clouds, which are closer to the earth's surface. Clouds contain water droplets that are larger than the wavelengths of all seven colours of light. As a result,...

The sun is directly overhead at noon, thus light travels a shorter distance through the atmosphere to reach the ground. Only blue light is dispersed due to the short distance of light, while the...

At dawn and sunset, the sun's light must travel the greatest distance through the atmosphere to reach the observer. Because blue light with a short wavelength is lost owing to scattering, red light...

As light passes through the atmosphere, the air molecules in its passage disperse it in different ways. Because of its small wavelength, blue light scatters more than red light with a longer...

Because of its short wavelength, blue is the colour that scatters the most. The sky's blue colour is due to the scattering characteristic of light.

Because the moon has no atmosphere, there is no light scattering on its surface. As a result, no light reaches the eyes of an observer on the moon's surface save that which comes directly from the...

In visible light, red light has the longest wavelength. As a result, red-colored light is dispersed the least by air molecules in the environment. As a result, when compared to other colours, red...

The light with the longest wavelength is the least dispersed. As a result, red-colored light scatters the least.

(a) Yellow light has the longest wavelength of the three radiations. As a result, it is the least dispersed. (b) Blue light has the shortest wavelength of the three radiations. As a result, it is...

Because the intensity of dispersed light is inversely proportional to the wavelength's fourth power. As a result, violet is the most widely dispersed colour, whereas red is the least.

The fourth power of the wavelength is discovered to be inversely related to the intensity of scattered light. When the size of the air molecules is less than the wavelength of incoming light, this...

As soon as the white light from the sun enters the earth's atmosphere, it gets dispersed or spread out in all directions by dust particles and air molecules. The dispersion of light is the name for...

Given, wavelength is 0.01\(\overset{\circ }{\mathop{A}}\,\) Rays speed=\(3\times {{10}^{8}}\) Light speed = frequency × wavelength \(c=\frac{\lambda }{v}\) Therefore, Frequency= \(3\times...

(a)An electromagnetic wave has a frequency of 500MHz so,  Frequency = 500 MHz Wavelength = 60 cm Wave velocity = frequency x wavelength Therefore, Wave velocity is \(3\times {{10}^{8}}\) (b) An...

P stands for infrared radiation.

Carbon arc-lamps are the source of UV light.

Gamma rays are the most energetic electromagnetic radiations.

(i)Infrared radiations are employed for fog photography because they are less dispersed and can penetrate the fog effectively. (ii)Because infrared radiation is not visible and does not absorb well...

(a) If the human body is exposed to ultraviolet light for an extended period of time, it might create health problems such as skin cancer. (b) Skin burns are caused by infrared radiation.

Water vapour, carbon dioxide, methane, and ozone are the major greenhouse gases found in the earth's atmosphere. The greenhouse gases in the earth's atmosphere absorb infrared energy.

a) To obtain the UV light spectrum, you'll need a quartz prism. (b) By passing radiations through a rock salt prism, infrared radiations can be obtained.

Infrared radiation has two distinct qualities from visible light. (a) They absorb through glass, but not through rock salt. (b) A thermopile or a darkened bulb thermometer is used to identify them...

In vacuum, infrared radiations travel in straight lines like light, at a speed of \(3\times {{10}^{8}}\) m/s. (b) They follow the reflection and refraction laws. (c) Electric and magnetic fields...

UV rays have two characteristics that distinguish them from visible light. (a) Although ultraviolet rays can penetrate through quartz, they are absorbed by the glass. (b) They are commonly dispersed...

(a) In air or vacuum, ultraviolet radiation travels in a straight line with a speed of \(3\times {{10}^{8}}\) m\s. (b) They follow the reflection and refraction laws. (c) Because they are chemically...

Ultraviolet radiations are electromagnetic waves with wavelengths between 100\(\overset{\circ }{\mathop{A}}\,\) to 4000\(\overset{\circ }{\mathop{A}}\,\) Detection: If a silver chloride solution is...

The electromagnetic waves of wavelength in the range of 8000\(\overset{\circ }{\mathop{A}}\,\) to 10000000\(\overset{\circ }{\mathop{A}}\,\) are known as infrared radiations Detection: When a...

Infrared radiations are emitted by all red hot bodies, such as a heated iron ball, flame, or fire. Ultraviolet radiation is produced by electric arcs and sparks.

(a) Gamma rays and infrared radiations (Wave A and B). (b) In vacuum, all electromagnetic waves travel at the speed of light. In a vacuum, the ratio of these waves' velocity is 1: 1.

(a)The wavelength of gamma rays is the shortest. (b) Infrared photons are employed to take photos in low light. (c) Gamma rays are the waves created by changes in an atom's nucleus. (d) X-rays have...

(a) Radar communication uses microwaves. (b) Ultraviolet rays are employed in the production of vitamin D in plants and animals' diet. (c) Infrared radiation is utilised to control televisions and...

X-rays and ultraviolet radiations are electromagnetic waves with shorter wavelengths than violet light. UV rays have a wavelength of 100 \(\overset{\circ }{\mathop{A}}\,\) to 4000\(\overset{\circ...

(a)Infrared radiation has a wavelength of more than \(8\times {{10}^{-7}}\) m. (b)Ultraviolet radiation has a wavelength of less than \(4\times {{10}^{-7}}\)m

(a)Ultraviolet rays have a wide range of wavelengths from 100 \(\overset{\circ }{\mathop{A}}\,\) to 4000\(\overset{\circ }{\mathop{A}}\,\) (b) Visible rays have a wide range of wavelengths from 4000...

(a)The thermopile can detect infrared radiation. (b)Silver chloride can detect ultraviolet radiations because it turns dark in their presence.

The invisible spectrum is the portion of the spectrum between the red and violet extremes to which our eyes do not respond.

(i)Infrared light is found beyond the red end of the spectrum. (ii)The ultraviolet part of the spectrum is located beyond the violet end of the spectrum.

The visible electromagnetic waves have a wavelength of 4000\(\overset{\circ }{\mathop{A}}\,\) to 8000\(\overset{\circ }{\mathop{A}}\,\)

Beyond the violet end of the visible spectrum, there are three rays that are unseen. (i) Gamma rays (ii) X-rays (iii) Ultraviolet rays There wavelengths are: (i) Gamma rays – less than 0.01 nm (ii)...

Infrared radiations are electromagnetic waves that extend beyond the visible light spectrum's red extreme and provide a substantial heating impact. The wavelength range is 8000\(\overset{\circ...

(a)In the study of crystals, X-rays are used. (b)It can also be used to diagnose fractures in bones and teeth.

(a) X rays have a wavelength of 50\(\overset{\circ }{\mathop{A}}\,\) (b) In vacuum, the speed of an electromagnetic wave is \(3\times {{10}^{8}}\) m/s. (c) Because they are stopped by bones, they...

(a)The wavelength of gamma rays is \({{10}^{-3}}\) nm. (b) Gamma rays have a powerful penetrating ability.

(a) Radiations are arranged in increasing wavelength order. (i) Gamma rays (ii) X- rays (iii) Infrared rays (iv) Microwaves (v) Radio waves (b) Satellite communication is carried out using...

The electromagnetic spectrum is organised in increasing order of wavelength. (i)gamma rays (ii)X – rays (iii)Ultraviolet rays (iv)Light that can be seen (v)Infrared radiations (b) Gamma rays are the...

Given, \(c=3\times {{10}^{8}}\) m/s is the speed of light. \(3.75\times {{10}^{14}}\)Hz to \(7.5\times {{10}^{14}}\) Hz is the frequency range. We know that, Frequency x wavelength = light speed If...

Given, 550 nm is the wavelength\(=550\times {{10}^{-9}}m\) \(c=3\times {{10}^{8}}m/s\) is the speed of light. We are aware of this. Frequency = Light Speed / Wavelength Therefore, Frequency of...

White light has a wavelength range of 400 nm to 800 nm.

The colour red is found at the extreme end of a prism, opposite the base.

When a white light ray strikes a prism, it experiences both deviation and dispersion at its first surface.

(a) Inside the prism, the light beam will be parallel to the base. In the case of a minimum deviation, angle of emergence equals angle of incidence (b) White light is broken down into its component...

If the yellow light is replaced by a narrow beam of white light incident at the same angle, the figure depicting the beam's transit through the prism is as follows:

(a)The seven colours of the spectrum are violet, indigo, blue, green, yellow, orange, and red. (b) No, the width of the spectrum varies depending on the colour. (c) (i) Violet is the colour that...

The spectrum is the swath of colours visible on a screen when white light is passed through a prism.

When white light enters the initial surface of a prism, light of different colours deviates through distinct angles towards the prism due to their varied speeds in glass. The dispersion of white...

When white light enters the first surface of a prism, light of different colours deviates by distinct angles towards the prism's base due to their varied speeds in glass. As a result, the difference...

When a beam of white light passes through a transparent medium, it disperses into its seven constituent colours, which is known as dispersion.

(a) In a vacuum, both colours have the same speed. (b) In glass, the red colour has a faster speed.

When white light strikes a glass prism, each of its colours is refracted at a distinct angle, with red being the least deviated and violet being the most.

Green, yellow, orange, and red are colours with longer wavelengths than blue light.

The seven primary colours of the white light spectrum are red, orange, yellow, green, blue, indigo, and violet, in order of increasing frequency.

In order of increasing wavelength, violet, indigo, blue, green, yellow, orange, and red are the seven primary colours found in white light.

a) The wavelength of blue light is around 4800 \(\overset{\circ }{\mathop{A}}\), while the wavelength of red light is approximately 8000 \(\overset{\circ }{\mathop{A}}\). (b)The frequency of red...

(i) The wavelength range in \(\overset{\circ }{\mathop{A}}\,\) is 4000 to 8000.(ii) The wavelength range of 400 nm to 800 nm in nanometers

In glass, red travels the fastest while blue travels the slowest.

As the wavelength increases the speed of light in glass also increases

The deviation created by a prism grows as the wavelength of light incident on it decreases.

The prism's deviation is determined by the four elements listed below.(i) Angle of Incidence - As the angle of incidence increases, the angle of incidence increases first. For a given angle of...