Question Library

The angle of deviation of light of various colours passing through a triangular prism increases in the order

The particle nature of light is demonstrated by the

The equation of a certain progressive transverse wave is y = 2 sin 2 \(\pi ( \frac{t}{0.01} - \frac{x}{30})\), where x and y are in cm and t in seconds. Calculate the period of the wave.

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?

Images formed by a convex mirror are always

A string under tension produces a note of frequency 14Hz. Determine the frequency when the tension is quadrupled.

Which of the following statements about waves in pipes is correct?

The diagram above illustrates a waveform. Which of the point on the waveform are in phase?

(a) What is a polarizer? (b) With the aid of a diagram, explain how a polarizer can be used to polarize a beam of unpolarized light.

Write down the name of: (a) two particles used in explaining the wave nature of matter; (b) one device whose invention is based on the wave nature of matter.

Using the diagram above as a guide, carry out the following instructions: Fix a plain sheet of paper on the Celotex board. Place the rectangular glass prism on the paper and trace its outline, ABCD. Remove the prism. Draw a normal NMP to meet AB and DC at M and P respectively such that |AM|=DP=2.0cm. Trace the ray PQ with two pins, \(P_1\) and \(P_2\) at P and Q respectively such that angle MPQ = i =50º Replace the prism on its outline. Trace the emergent ray with two other pins \(P_3\) and \(P_4\) such that they lie in a straight line with \(P_2\) and the image of \(P_1\) viewed through the glass prism. Measure and record \(\theta\), the angle between the emergent ray and face AB of the glass prism. Evaluate cos \(\theta\) and sin i. Repeat the procedure for four other values of i = 10^\circ, 15^\circ,20^\circ and25^\circ. Tabulate your readings. Plot a graph with cos \(\theta\) on the vertical axis and sin i on the horizontal axis. Determine the slope, s, of the graph State two precautions taken to ensure accurate results. Attach your traces to your answer booklet (b)i. State the laws of refraction of light ii. Explain what is meant by the statement the refractive index of a material is 1.65

The equation of a wave traveling in a horizontal direction is expressed as y = 15 sin \(\frac{2\pi}{5}\) (60t - x). What is its wavelength?

The characteristic of a vibration that determines its intensity is the

Where can a man place his face to get an enlarged image when using a concave mirror to shave?

The magnification of an object 2cm tall when placed 10cm in front of a plane mirror is