oil immersion lens meaning in Hindi

Examples

1. An oil immersion lens usually has a magnification of 40 to 100?
2. All specimens, regardless of consistency, are permanently stained prior to microscopic examination with an oil immersion lens.
3. This discovery remained controversial until the development of the oil immersion lens in 1884 and of superior staining methods in 1890 1891.
4. Use of an oil immersion lens with the incorrect immersion oil, or without immersion oil altogether, will suffer from spherical aberration.