Licchavi Lyceum


Licchavi Lyceum

Does Light Always Move At The Same Speed?

How fast can you run?

10 Km/h, 20 Km/h ….or faster?

Imagine the fastest speed that can be achieved in space?

it’s 300000 Km/h, the speed of light.

No matter how far away we look into the distant Universe, the physics governing atoms, and therefore... [+] our definitions of length, time, and the speed of light, are exactly the same.
Source: NASA Web
  1. Light, no matter how high-or-low in energy, always moves at the speed of light, so long as it’s traveling through the vacuum of empty space.
  2. By passing that light into a non-vacuum medium, you can change its speed so long as it’s in that medium.
  3. Light of different energy will change its speed by slightly different amounts, depending on the properties of that medium.
  4. Once you leave that medium and go back into a vacuum again, that light goes back to moving at the speed of light.
Why Is the Sky Blue? | NASA Space Place – NASA Science for Kids
Source: NCERT Book

#1. What is the speed of Light in vacuum?

Speed of Light remains same in Vacuum.

#2. Which of the following is not a raw-material for fertilizer industry?

Ans: (D)

Solution: Factual Question

#3. Non-metallic mineral is

Ans: (A)

Solution: Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. It is not metallic.


#4. There are how many pairs of cranial nerves in human?

Ans: (B)

Solution: There are 12 pairs of cranial nerves in humans.

#5. The pyramid of energy in any ecosystem is

Ans: (A)

Solution: The pyramid of energy, however, is always upright.

Ecological Pyramid: Common parameters used for constructing ecological pyramids are the number of individuals (pyramid of numbers), dry weight (pyramid of biomass) or rate of energy flow (pyramid of energy) at successive trophic levels.

#6. Monosodium glutamate (MSG) in food is used as

Ans: (B)

Solution: Monosodium glutamate (MSG) is a flavor enhancer commonly added to Chinese food, canned vegetables, soups and processed meats.

#7. Which of the following disease is related to Corona virus?

Ans: (D)

Solution: All are related to Corona Virus.

#8. Which is not a type of secondary memory?

Ans: (C)

Solution: RAM is a primary Memory.

#9. What is XML stands for?

Ans: (B)

Solution: XML stands for extensible markup language. A markup language is a set of codes, or tags, that describes the text in a digital document. The most famous markup language is hypertext markup language (HTML), which is used to format Web pages.

#10. Microwaves are electromagnetic waves having frequencies in range of

Ans: (C)

Solution: Audible Range: 20 Hz to 20 KHz.
Ultra Sound: 20 KHz to 200 MHz.
Infra Sound: Less than 20 Hz.

Microwave frequencies range between 1 GHz to 1000 GHz.


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