SELF ASSESSMENT

1.       Light will have various interactions with transparent medium. Which following interaction shows the best description of diagram?

• Diffraction

• Reflection

• Refraction

• Absorption

“Refraction is the change in direction of light ray as it crosses the boundary between two different medium”.

•          TRUE

• FALSE

A bending of light as it travels from one medium to another.

               Choose matching term of the statement above  :

• Lens

• Refraction

• Astigmatism

• Reflecting Telescope

Which is the index of refraction of glass

• 1.5

• 0.5

• 4.5

• 2.5

On heating a liquid, the refractive index generally

• Decreases

• Increases or decreases depending on the rate of heating

• Does not change

• Increases

What is speed of light in air and free space?

• 3.1e8 m/s

• 3.0e8 m/s

• 3.2e8 m/s

• 3.4e8 m/s

Lights have difference speed when travel inside different medium. “The higher refractive index (n) of the medium, the speed of light become faster”.

• TRUE

• FALSE

Different wavelength of light will give different speed of light.

• TRUE

• FALSE

Which one of the following lights has the lowest speed?

• Free space

• Air

• Water

• Diamond

When a light wave goes from air into water,  the quality that remains unchanged is its

•  Speed

• Amplitude

• Frequency

• Wavelength