Ramesh passed white light through sodium vapour lamp and observed darklines in the bright background then make assumptions for getting these dark lines on bright background.
Answers
9th ko text book konse hotehai or unke name and pic please send kro please
https://brainly.in/question/16412089?utm_source=android&utm_medium=share&utm_campaign=question
Answer:
Explanation:
A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.
Two varieties of such lamps exist: low pressure and high pressure. Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting, such as street lamps, where they are widely used.[1] High-pressure sodium lamps emit a broader spectrum of light than the low-pressure lamps, but they still have poorer color rendering than other types of lamps.[2] Low-pressure sodium lamps only give monochromatic yellow light and so inhibit color vision at night.