light wave nature

Light waves are ......................waves

• Sound
• Radio
• Electromagnetic
• Mechanical

Which of these characteristics is not applied on light ?

• a. It is an electromagnetic wave.

• b. It needs a medium to travel through.

• . It travels in straight lines.

• It has the ability to stimulate the sense of vision.

The distance that light travels in a second is .............

• a. light frequency.

• c. light intensity.

• d. light energy.

• b. light speed.

4. The main source of light on the Earth’s surface is the .....................

• Sun
• Fire
• Stars
• Moon

5. White light consists of ,,,,,,,,,,,,,,,,, spectrum colours.

• 5

• 4

• 7

• 2

............... colour has the lowest deviation.

• Violet

• blue
• Yellow

• red

. The colour ............................in the spectrum colours has the highest frequency.

• red
• green
• yellow
• violet

If the frequency of red colour is 4 x 10 ¹² Hz, the frequency of violet colour is ...........

• Less than 4 x 10¹² Hz

• 4 x 10¹² Hz

• Greater than 4 x 10¹² Hz

• Equal to 4 x 10¹² Hz

Photon energy = Planck’s constant x .......................

• mass
• frequency
• speed
• wavelength

The quanta of ........................ colour has the highest energy.

• blue
• green
• red
• violet