Physics WAEC Past Questions

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351

A ray of light is incident on a glass block as shown in the diagram above. If the reflected and the retracted rays are perpendicular to each other, what is the refractive index of the glass relative to air.?

A. 1.65
B. 1.58
C. 1.52
D. 1.50
E. 1.48

View Answer & Discuss (6) WAEC 1996

352

When a ray of light is incident normally on an air- glass interface, its angle of refraction is

A. 0^o
B. 42^o
C. 45^o
D. 60^o
E. 90^o

View Answer & Discuss (1) WAEC 1996

353

The refractive index of a medium relative to air is 1.8. Calculate the critical angle for the medium to the nearest degree.

A. 18^o
B. 34^o
C. 45^o
D. 68^o
E. 90^o.

View Answer & Discuss (2) WAEC 1996

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354

A converging lens of focal length 5cm forms a virtual image which is 10cm from the lens. How far from the lens is the object?

A. 2.0cm
B. 3.3cm
C. 5.0cm
D. 10.0cm
E. 15.0cm

View Answer & Discuss (7) WAEC 1996

355

Which of the following instruments produces sound by the vibration of air column?

A. Piano
B. Guitar
C. Flute
D. Hand bell
E. Talking drum

View Answer & Discuss WAEC 1996

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Physics WAEC Past Questions

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