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2061

A ray of light is incident at an angle of 30º on a glass prism of refractive index 1.5. Calculate the angle through which the ray is minimally deviated in the prism. (The medium surrounding the prism is air)

A. 10.5^o
B. 19.5^o
C. 21.1^o
D. 38.9^o
E. 40.5^o

View Answer & Discuss (7) WAEC 1991

2062

Calculate the refractive index of the material of the glass block shown in the diagram if YZ = 4cm

A. 0.40
B. 0.60
C. 1.50
D. 1.67
E. 2.50

View Answer & Discuss (10) WAEC 1991

2063

An image which can be formed on a screen is said to be

A. virtual
B. blurred
C. inverted
D. erect
E. real

View Answer & Discuss WAEC 1991

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2064

Which of the following are true of plane-polarised light? i. Plane polarisation of light is the formation of hydrogen bubbles on the particle of light. ii. Plane polarisation of light is the splitting of light into its spectral components iii. A plane polarised light vibrates in one plane. iv. Polarisation of light is characteristic of transverse vibration