Physics Practice Test – Reflection of Light Waves

The letter F is placed in front of a plane mirror as illustrated in the diagram below.

 
Which of the following represents the image observed?

When the size of the hole of a pin hole camera is increased, the resultant image formed becomes ________

A. sharper.     B. reduced in size.     C. enlarged.     D. blurred.

In which of the following pieces of apparatus is the radius of curvature equal to twice the focal length?

A. Converging lens      B. Diverging lens      C. Converging mirror      D. Parabolic mirror.

Which of the following distances is usually adjustable in the camera? The distance between the _______

A. lens and the film
B. diaphragm and the shutter
C. shutter and the film
D. diaphragm and the film.

At which position should an object be placed in front of a concave mirror in order to obtain an image which is of the same size as the object?

A. At the centre of curvature.
B. At the principal focus.
C. Between the pole and principal focus.
D. Between the centre of curvature and principal focus.