This paper reports the first demonstration of a technique that makes an optically thick medium transparent through electromagnetically induced transparency (EIT). The transparency arises from destructive interference between two dressed states created by a coupling laser. The experiment uses a coupling laser to induce transparency in an autoionizing transition of strontium (Sr), changing the transmittance from exp(-20) to exp(-1). The observed transparency is not due to saturation or hole-burning but results from interference between dressed states. The study shows that when the Rabi frequency of the coupling laser exceeds the inhomogeneous width of the transition, the medium becomes transparent. The results are compared with theoretical models, showing good agreement. The experiment involved a coupling laser tuned to the line center of a specific transition, and a probe laser with a specific wavelength. The coupling laser's intensity and polarization were carefully controlled to achieve the desired effect. The study also discusses the implications of EIT for future technologies such as inversion-free lasers, Raman devices, and nonlinear optical devices. The results highlight the importance of temporal coherence in the coupling laser and show that EIT can be achieved with white light and a monochromator. The study also notes that the observed transparency is due to the combination of ac-Stark splitting and destructive interference between dressed states. The results demonstrate the potential of EIT for various applications in quantum optics and nonlinear optics.This paper reports the first demonstration of a technique that makes an optically thick medium transparent through electromagnetically induced transparency (EIT). The transparency arises from destructive interference between two dressed states created by a coupling laser. The experiment uses a coupling laser to induce transparency in an autoionizing transition of strontium (Sr), changing the transmittance from exp(-20) to exp(-1). The observed transparency is not due to saturation or hole-burning but results from interference between dressed states. The study shows that when the Rabi frequency of the coupling laser exceeds the inhomogeneous width of the transition, the medium becomes transparent. The results are compared with theoretical models, showing good agreement. The experiment involved a coupling laser tuned to the line center of a specific transition, and a probe laser with a specific wavelength. The coupling laser's intensity and polarization were carefully controlled to achieve the desired effect. The study also discusses the implications of EIT for future technologies such as inversion-free lasers, Raman devices, and nonlinear optical devices. The results highlight the importance of temporal coherence in the coupling laser and show that EIT can be achieved with white light and a monochromator. The study also notes that the observed transparency is due to the combination of ac-Stark splitting and destructive interference between dressed states. The results demonstrate the potential of EIT for various applications in quantum optics and nonlinear optics.