282031 When an object is more along the principle axis of a concave mirror placed in air, the image coincides with the object if the object is $50 \mathrm{~cm}$ from the mirror. If the mirror is place at the depth of $20 \mathrm{~cm}$ in transparent medium, the image coincided with the object when the object is $40 \mathrm{~cm}$ from the mirror. The refractive index of the liquid is
282031 When an object is more along the principle axis of a concave mirror placed in air, the image coincides with the object if the object is $50 \mathrm{~cm}$ from the mirror. If the mirror is place at the depth of $20 \mathrm{~cm}$ in transparent medium, the image coincided with the object when the object is $40 \mathrm{~cm}$ from the mirror. The refractive index of the liquid is
282031 When an object is more along the principle axis of a concave mirror placed in air, the image coincides with the object if the object is $50 \mathrm{~cm}$ from the mirror. If the mirror is place at the depth of $20 \mathrm{~cm}$ in transparent medium, the image coincided with the object when the object is $40 \mathrm{~cm}$ from the mirror. The refractive index of the liquid is
282031 When an object is more along the principle axis of a concave mirror placed in air, the image coincides with the object if the object is $50 \mathrm{~cm}$ from the mirror. If the mirror is place at the depth of $20 \mathrm{~cm}$ in transparent medium, the image coincided with the object when the object is $40 \mathrm{~cm}$ from the mirror. The refractive index of the liquid is