Physics 1985 JAMB Past Questions

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Two rays of light from a point below the surface of water are equally inclined to each other at 60^o in water. What is the angle between the rays when they emerge into air? (Take the refractive index of water to be \(\frac{4}{3}\))

A. 41.8^o
B. 44.1^o
C. 60.0^o
D. 83.6^o
E. 120.0^o

View Answer & Discuss (19) JAMB 1985

A narrow beam of white light can be split up into different colours by a glass prism. The correct explanation is that

A. white light is an electromagnetic wave
B. the prism has all the colours of the white light
C. white light has undergone total internal reflection in the prism
D. different colours of white light travel with different speeds in glass
E. white ligth consist of yellow, green and red colours

View Answer & Discuss (2) JAMB 1985

A charge of one coulomb liberates 0.0033g of copper in an electrolytic process. How long will it take a current of 2A to librate 1.98g of copper in such a process?