Seven-year-old Kavya was the most curious girl in her school in Hyderabad. She asked “Why?” about everything. Why do birds fly? Why is the ocean salty? Why do we dream?

One evening, Kavya was sitting on the terrace watching the sunset. The sky was turning from blue to orange to pink.

“Amma, why is the sky blue?” she asked her mother, who was a scientist at the Indian Space Research Organisation (ISRO).

Amma smiled. She loved Kavya’s questions. “Imagine sunlight is like a box of crayons,” she began. “White sunlight is actually made of ALL colours mixed together — red, orange, yellow, green, blue, indigo, and violet.”

“ALL colours? But sunlight looks white!” said Kavya, amazed.

“That’s because they’re mixed. But when sunlight enters Earth’s atmosphere — the blanket of air around our planet — something magical happens.”

Amma picked up a glass of water and shone a torch through it. A tiny rainbow appeared on the wall!

“See? Light can be separated into colours!” said Amma. “The atmosphere does the same thing. Tiny particles in the air scatter the blue light in all directions. That’s why the sky looks blue!”

“But why BLUE? Why not red or green?” asked Kavya.

“Because blue light has shorter wavelengths. Short wavelengths bounce around more easily. Red light has longer wavelengths — it goes straight through without bouncing.”

“Is that why sunsets are orange and red?” asked Kavya excitedly. “Because in the evening, sunlight travels through MORE atmosphere, and all the blue gets scattered away, so only red and orange are left?”

Amma’s eyes went wide. “Kavya! That is exactly right! You figured it out yourself!”

Kavya grinned proudly. “So the sky isn’t really blue — it just LOOKS blue because of how light bounces!”

“You’re thinking like a real scientist,” said Amma, hugging her. “The universe is full of wonders. All you need to do is ask ‘Why?’ and never stop looking for answers.”

That night, Kavya wrote in her notebook: “Today I learned why the sky is blue. Tomorrow I want to learn why stars twinkle. Science is the most exciting adventure — and you don’t even need to leave your terrace!”