When a beam of accelerated electrons hits a target , a continuous `X` - ray
Channel: Doubtnut
Date: 2020-01-19

When a beam of accelerated electrons hits a target , a continuous `X` - ray spectrum is emitted from the target. Which of the following wavelength is absent in `X` - ray spectrum , if the `X` - ray tube is operating at `40,000 \"volts\"`?