Question Library

Oxidation of the filament in a light bulb is prevented by the introduction of

(a) Differentiate between plane polarization and interference as applied to waves. (b) List two uses of polaroids.

(a) Write down the names of two particles used in explaining the wave nature of matter. (b) State the wave characteristics which are exhibited by the particles named in (a) above.

You are provided with three retort stands, a pendulum bob, a drawing board, a stopwatch, and other necessary apparatus. Using the diagram above as a guide, carry out the following instructions. Fix the drawing paper on the drawing board and hold the board with two clamps such that it is vertical. Suspend the pendulum bob such that it hangs freely in front of the drawing paper. Draw a line RP representing the rest position of the pendulum string and mark the position P of the centre of the pendulum bob at rest. Displace the pendulum bob to one side in a plane parallel to the drawing board. Mark the new position P\(^{1}\) of the centre of the bob. Measure and record the perpendicular distance, d of P\(^{1}\) from the line RP Evaluate and record d\(^{2}\). Measure and record the vertical height h of P\(^{1}\) above P. Evaluate G =\(\frac{d^{2}}{h}\) Repeat the procedure for four other positions of P\(^{1}\). Tabulate your readings. Remove the drawing board so that the pendulum bo can swing freely. Set the pendulum bob oscillating through a small bob amplitude and determine the time, t for 20 oscillations. Determine and record the period, T. Plot a graph with G on the vertical axis and h on the horizontal axis, starting both axes from the origin (0,0). Determine the intercept I on the horizontal axis. Evaluate A = \(\frac{1}{19.7T^{2}}\) State two precautions taken to obtain accuratee results. (Attach your drawing paper to your answer booklet.) (b)i. Distinguish between the period and frequency of oscillation of a simple pendulum. ii. Differentiate between oscillatory and rotational motions.

Calculate the position of an object placed in front of a convex mirror having focal length of 12 cm such that an image is formed 6 cm away from the mirror

When light passes through two media x and y of refraction indices 1.51 and 1.33 respectively, the speed of light in

The wave phenomenon demonstrated in the diagram above is?

If a light wave has a wavelength of 500nm in air what is the frequency of the wave? [c = 3 x 10\(^8\) ms-1]

A boat is rocked by waves of speed 30ms-1 whose successive crest are 10m apart. Calculate the rate at which the boat recieves the waves

Which of the following waves is not transverse

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

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

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

Which of the following characteristics of light determines its colour?

Sound interference is necessary to produce the phenomenon of