The correct answer of this question is : Artificial luminous sources.
EXPLANATION :
As per the question, we are given some light sources like halogen, laser, sodium-vapor etc.
There are two types of bodies which are known as luminous and non luminous depending on their production of light.
All these sources given in the question are luminous sources as they have their own light. Most importantly they are not natural luminous sources like stars, firefly etc.
All these sources are artificial.
Hence, the correct answer of this question is artificial luminous sources.
OK think of it distance,The smaller the distance less momentum is needed the Longer the distance the the longer the momentum is needed.
And The Answer Is quite easy their was no reason to be asked
Answer:1.0meter
Sorry but i dont know i was doing this for some point sorry
Answer:
water
is missing in above equation
hope it helps
Answer:in human life. The French biologist Jean-Baptiste Lamarck (1744-1829) advocated the idea that animals acquired characteristics after using certain physical traits constantly.
Explanation: