Waec Physics 2009 Past Questions and Answers

Question 26:

• WAEC 2009

Light travelling through a small pinhole usually does not make a shadow with a distinct sharp edge because of

A. Diffraction
B. Inteference
C. Reflection
D. Refraction

Question 27:

• WAEC 2009

The angle of incidence of a ray of light on a plane mirror is 55^o. Determine the angle between the reflected ray and the mirror

A. 35^o
B. 45^o
C. 55^o
D. 110^o

Question 28:

• WAEC 2009

A concave mirror forms a magnified and errect image only when the object is placed

A. At the centre of curvature
B. At the focus
C. Between the focus and the pole of the mirror
D. Beyound the radius of curvature

Question 29:

• WAEC 2009

A thin lens is placed 50cm from an illustrated object. The image produced has linear magnification of \(\frac{1}{4}\). Calculate the power of the lens in dioptres

A. 2.5D
B. 5.0D
C. 10.0D
D. 25.0D

Question 30:

• WAEC 2009

Which of the following characteristics of light determines its colour?

A. Velocity
B. Wavelength
C. Amplitude
D. Intensity