An object is embedded in a block of ice; 10cm below the plane surface. If the refractive index of the ice is 1.50; the apparent depth below the surface is?

A. 2.50 cm
B. 6.67 cm
C. 7.50 cm
D. 7.63 cm

Correct Answer:

Option B = 6.67 cm

Explanation

Refraction index, n = (real depth)/apparent depth
1.5 = (10)/X
X = (10)/1.5 = 6.67 cm