Describe how the refractive index of a liquid can be determined using a concave mirror. (5marks) Or, Describe with the aid of a diagram how the refractive index of a transparent liquid may be determined.(5marks)

Describe how the refractive index of a liquid can be determined using a concave mirror. (5marks)

Or,

Describe with the aid of a diagram how the refractive index of a transparent liquid may be determined.(5marks)

An experiment to determine refractive index of a liquid using a concave mirror

• A clamped pin with its tip along the principal axis above the concave mirror is coincided with its image at C and distance PC is measured
• A small quantity of the liquid under test is poured into a concave mirror and a new point I at which the object pin coincides with its image is obtained.
• Distance IP is measured.
• The required refractive index of a liquid, n_l= CP/IP

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