# Structure of light Questions

## Important Question

1. The amount of detail observed by microscope is not improved by increase in magnifying power because it is strictly limited by __

• a) Electricity voltage
• b) Amount of light
• c) Structure of light
• d) All of the above

2. According to _ theory light is transmitted from luminous body to eye.

• a) Photon
• b) Light
• c) Wave
• d) All of the above

3. Many individual bodies/particles; that make light are called __

• a) Electrons
• b) Protons
• c) Neutrons
• d) Photons

4. What is the correct velocity of light transmission?

• a) 1,86,300 miles/second
• b) 1,86,300 km/second
• c) 1,86,300 meter/second
• d) 1,86,300 nautical miles/second

5. What is the range of wavelength of light (visible) rays?

• a) 3850 to 7600 Å
• b) 3850 to 7600 nm
• c) 3600 to 8850 Å
• d) 3600 to 7850 nm

6. Which of the following sentence is not correct for light?

• a) The light rays are made up of photons
• b) Wavelength of visible rays falls in the range of 385 to 760 nm
• c) The velocity of light is about 1,86,300 kilometer/second
• d) The vibrations of the ether are transverse to the direction of propagation of the wave motion

7. Light rays with wavelength range between 1000 to 3850 Å are known as_______

• a) Infrared
• b) Visible
• c) Ultraviolet
• d) X-ray

8. Light rays with wavelength 7600Å and above are called_______

• a) Visible
• b) Infrared
• c) Ultraviolet
• d) Gamma rays

9. Which of the following color has shortest wavelength?

• a) Red
• b) Green
• c) Violet
• d) Blue

10. Which of the following color has longest wavelength?

• a) Orange
• b) Red
• c) Violet
• d) Indigo

11. In color spectrum violet color has _ wavelength and_ energy

• a) Shortest, highest
• b) Longest, highest
• c) Shortest, lowest
• d) Longest, lowest

12. Identify the correct sequence of color spectrum from highest wavelength to lowest wavelength.

• a) Violet, indigo, blue, green, yellow, orange, red
• b) Red, orange, yellow, green, blue, indigo, violet
• c) Violet, green, blue, yellow, indigo, orange, red
• d) Red, blue, indigo, violet, orange, yellow, green

13. What do you mean by 1 Å?

• a) 10-10meter
• b) 10-8 cm
• c) 10-7mm
• d) All of the above

14. 1 meter is equals to.

• a) 1010 Å
• b) 109 nm
• c) 106 µm
• d) All of the above

15. 1 Å is equals to:

• a) 1/10,000,000 mm
• b) 1/25,00,00,000 inches
• c) Both of the above
• d) None of the above

16. How visible light rays are roughly divided into 3 portions? Choose correct option.

• a) Red from 4000 to 5000 Å, green from 5000 to 6000 Å, Blue-violet from 6000 to 7000 Å
• b) Blue-violet from 4000 to 5000 Å, green from 5000 to 6000 Å, red from 6000 to 7000 Å
• c) Green from 4000 to 5000 Å, b lue-violet from 5000 to 6000 Å, red from 6000 to 7000 Å
• d) Blue-violet from 4000 to 5000 Å, red from 5000 to 6000 Å, green from 6000 to 7000 Å