Example 6.3.1.
The speed of sound is fastest in
- liquids.
- solids.
- gases.
- vacuum.
Solution.
b.
Section 6.3 Examples
Example 6.3.2.
The frequency of a sound determines its quality and the amplitude of the sound determines its .
- timber.
- frequency.
- loudness.
- pitch.
Solution.
c.
Example 6.3.3.
which wave given below is partly longitudinal and partly transverse?
- light wave.
- sound wave.
- water wave.
- string wave.
Solution.
c.
Example 6.3.4.
When a wave goes from one medium to another medium, which quantity of wave does not change?
- frequency.
- speed.
- amplitude.
- wavelength.
Solution.
a.
Example 6.3.5.
Indicate the amplitude of a wave in the figure below. 
Figure 6.3.6.
- PA.
- QC.
- AB.
- CD.
Select one of the following.
- Both I and II
- Both III and IV.
- I only.
- III only.
Solution.
empty.
Example 6.3.7.
Indicate the wavelength of a wave in the figure below.
Figure 6.3.8.
- PA.
- QC.
- AB.
- CD.
Select one of the following.
- Both I and II
- Both III and IV.
- I only.
- III only.
Solution.
empty.
Example 6.3.9.
How far inside the plane mirror your image appears?
- As far as I am standing infront of the mirror.
- Just double the distance I am standing infront of the mirror.
- Cannot be determined.
- depends upon my size.
Solution.
a.
Example 6.3.10.
What causes the pool of water appears to be less deep than it actually is
- Reflection.
- Refraction.
- Dispersion.
- Scattering.
Solution.
b.
Example 6.3.11.
What causes light to refract to form rainbow in the sky?
- glass prisms.
- sunlight rays
- small raindrops
- air molecules.
Solution.
c.
Example 6.3.12.
why does the fork look larger under water?
- light is refracted at an angle.
- light cannot pass through the glass.
- the amount of light increases when going through water.
- the wavelength of light increases in the process.
Solution.
a.
Example 6.3.13.
When light passes through a prism the light splits into the visible spectrum. What color bends the most and has the shortest wavelength?
- red.
- violet.
- yellow.
- blue.
Solution.
b.
Example 6.3.14.
The color of object you see is the color that is
- absorbed by the object.
- reflected by the object.
Solution.
b.
Example 6.3.15.
What is the speed of wave which completes one full cycle in \(10 \,s\) and has a wavelength of \(120\, m\text{?}\)
Answer.
\(v=12 m/s.\)
