General Awareness - Physics - Light and Colours

Physics - Light Related Questions

1. The scientist who first calculated the speed of light

Answer: Romar

(Accurately estimated speed - Albert McKenzon)

2. What is a parsec?

Answer: 3.26 light-years

(An astronomical unit is - 150 million km)

3. The unit that states the greatest distance to the stars

Answer: Light year

(Unit for measuring the distance between the Sun and the planets - Astronomical unit)

4. The unit that measures the distance between galaxies

Answer: Parsec

5. A particle that travels faster than light

Answer: Tachyons

6. The basic particle of light is known as quantum is?

Answer: Photon

7. Who discovered that the fastest light travels in a vacuum?

Answer: Leon Foucault

8. Study of the nature of light

Answer: Optics

9. Who discovered the taxon that travels faster than light

Answer: ECG Sudarshan

10. Who formulated the wave theory of light?

Answer: Christine Huygens

11. The time it takes for sunlight to reach the earth

Answer: 8 minutes 20 seconds .. or 500 seconds

(Time taken for light from the moon to reach the earth -1.3 seconds)

 

12.In which medium light travels at maximum speed?

Answer: In the void

(In the slowest diamond)

 

13. Who formulated the quantum theory?

Answer: Max Planck

 

 

14. The component colour with the lowest wavelength and the highest frequency

Answer: Violet

 

15. The unit of wavelength of light

Answer: Angstrom

 

16. Color used to indicate danger in scientific laboratories

Answer: Yellow

 

 

 

17. The light phenomenon that causes stars to twinkle

Answer: Refraction

 

18. The cause of the desert mirage phenomenon

Answer: Refraction

 

19. Due to the beautiful colours found in soap bubbles, water and oil

Answer: Interference

 

20. The phenomenon that causes the formation of a rainbow

Answer: DISPERSION

 

21. The phenomenon of light causing the glow of a diamond

Answer: Full internal reflection

 

22. The ray used to identify counterfeit notes

Answer: Ultraviolet ray

 

23. Particles of different colours found in peacock feathers

Answer: Bulbuls

 

 

 

24. Mirror used as rear view in vehicles

Answer: Convex mirror

 

25. The scientist who discovered infrared rays

Answer: William Herschel

 

26. The scientist who explained the blue colour of the sea

Answer: CV Raman

(The blue colour of the sky was explained by Lord Reilly)

 

27. The phenomenon of shadows appearing randomly

Answer: Diffraction

 

28. The reason why the sky looks blue is due to which phenomenon of light

Answer: Diffusion (Diffusion is also the reason why seawater looks blue)

 

29. Who discovered taxons that travel faster than light?

Answer: ECG Sudarshan

 

30. Because of the belt around the sun

Answer: Diffraction (Diffraction is also the cause of rainbow colours seen on CDs)