Manoj observed a street light which is producing yellow light. Then he got many doubts in his mind. What could be those doubts ?

pH = - log [ H^+ ] it was written on the blackboard by Mohan. ? By seeing this, James got many doubts in his mind. What would be those doubts .

Dheeraj was brought a loud speaker nearer to a working television. He observed the picture in the TV. He got many doubts in his mind. What would be those

Akshay saw the specification of a bulb as 60 W and 120 V, on the surface of the bulb. She got many doubts in her mind. What would be those double ?

Do you observe yellow light in street lamps? Which will produce yellow light?

Rithvik got many doubts while observing an induction stove. What would be those?

A student observed a patient undergoing haemodialysis. He has many doubts about haemodialysis. What might be his doubts ?

James saw N+O_(2)rarr 2NO-Q on the blackboard and got some doubts in his mind. What would be those doubts? Guess and write four of them.

You have observed different types of glasses in the shop. You got some doubts in your mind . What are they ?

A sodium street light gives off yellow light that has a wavelength of 589nm . What is the frequency of this light?