Unit 2 – Nature of Light - Class 11 Chemistry Online Notes

Wave Nature of Light

The wave properties of light (electromagnetic radiation) are described in terms of the following parameters:

Frequency (ν, spell as mu, in Greek): The frequency of a wave is the number of cycles it undergoes per second. Its unit is 1/second (sec-1, it is also called Hertz, Hz)
Wavelength (λ, termed as lambda in Greek): The wavelength is the distance between any points on the wave and the corresponding point on the next crest or trough of the wave. It is the distance the wave travels during one cycle. The units of wavelength are meters (m), for very short distances it is nanometers (10-9m), picometers (10-12m) or non-SI unit is Angstrom (Å, 10-10m).
Speed: The speed of the wave is the distance it moves per unit time i.e. meters per second (m/s). It is the product of frequency (cycles per second) and wavelength (meters per cycle).

In a vacuum, the electromagnetic radiations move at 3.00x 108m/s and it is constant, represented as the speed of light, c. Thus c = ν x λ

Since c is constant, therefore ν and λ have a reciprocal relationship. The radiations with high frequency have low wavelength and vice versa.

Amplitude: It is the height of the crest or depth of troughs. For electromagnetic waves, the amplitude is related to the intensity of the radiation. It is the measure of brightness of the visible light. Light of low amplitude means it is less intense and dim, while the light of high amplitude means it is more intense and bright.

Read full chapter click Nature of Light - Class 11 Chemistry Online Notes

For more notes Chemistry notes for Class 11 visit Takshilalearning.

Comments

Lessons-Worksheets-Question Papers-CBSE Class 2 English

Lessons-Worksheets-Question Papers-CBSE Class 2 English CBSE 2nd Class English – One and Many In this blog, we share the spelling rules used in the concept of One and Many. When there is only one of a naming word (noun), it is said to be a singular noun . When a noun shows more than one, it is said to be in the plural . We can add –S, -es, -ves or ies to show that there is more than one noun. For example, we say many birds, four biscuits, six brushes. But for the students of Class 2 , it’s very difficult and confusing to understand where to use s , es, ves or ies in the form of many. Don’t worry, it looks difficult, but it is very easy as in grammar each concept has a set of rules that need to practice. Noun ending with –s, -x, -o, -sh, -ch, and –ss form plurals by taking –es. Look at these pairs of words: Bus – Buses Brush – Brushes Continue ..... Click here ...

Class 3 English Practice Grammar Worksheet -The Adverb

Class 3 English Practice Grammar Worksheet -The Adverb Class 3 English – The Adverb – Kinds of Adverb Fill in the blanks with suitable Adverbs of place. Choose from the box. Up outside everywhere back down away here there ...

Bhakti Movement NCERT Class 12 History

Bhakti Movement NCERT Class 12 History The Bhakti movement was an effort to achieve salvation and emancipation by devotion to God. In Hindi, the word bhakti refers to fervent devotion to God. This movement, which stressed a single-minded, ardent devotion to God, is seen as the most characteristic act of religious progress during the Middle Ages. In the 12th and 13th centuries, Kabir Das was a key figure in the Bhakti Movement. As a result of the movement, Kabir Das' poems and religious writings attained widespread fame. Kabir Das was raised up by a Muslim family. However, his religious beliefs were influenced by his Hindu teacher Ramananda, who regarded Rama as the highest God. The first Sikh guru and the founder of Sikhism was Guru Nanak. He vehemently opposed prejudice based on customs, rivalry, and caste in religion. Nanak was raised in a Hindu household and from an early age began to exhibit spiritual tendencies. He helped the indigent and underprivileged. His followers began r...

Takshila Learning - Online Tutorials

Search This Blog