NEET Questions

X-rays of $\lambda = 1\mathop A\limits^ \circ$ have frequency

The wavelength of ${K_\alpha }$ line in copper is $1.54\;\mathop A\limits^ \circ .$ The ionization energy of $K$ electron in copper in $Joule$ is

X-rays of $\lambda = 1\mathop A\limits^ \circ$ have frequency

X-rays of $\lambda = 1\mathop A\limits^ \circ$ have frequency

The speed of electromagnetic wave in vacuum depends upon the source of radiation

The $k$ line of singly ionized calcium has a wavelength of $393.3\,nm$ as measured on earth. In the spectrum of one of the observed galaxies, this spectral line is located at $401.8\,nm$. The speed with which the galaxy is moving away from us, will be

The $k$ line of singly ionized calcium has a wavelength of $393.3\,nm$ as measured on earth. In the spectrum of one of the observed galaxies, this spectral line is located at $401.8\,nm$. The speed with which the galaxy is moving away from us, will be

The observed wavelength of light coming from a distant galaxy is found to be increased by 0.5% as compared with that coming from a terrestrial source. The galaxy is

The observed wavelength of light coming from a distant galaxy is found to be increased by 0.5% as compared with that coming from a terrestrial source. The galaxy is

The time period of rotation of the sun is 25 days and its radius is $7 imes {10^8}\;m$. The Doppler shift for the light of wavelength $6000\mathop {\rm A}\limits^ \circ$ emitted from the surface of the sun will be