ICSE − Q & A

Explain why in daylight  an object appear red when seen through a red glass 
and black when seen through a blue glass?

+ 1 more questions by krishnair  

When yellow paint and blue paint are mixed we get a green colour. When yellow light and blue light are mixed, white light is obtained. Give reasons.
asked by Krish Rajiv Nair (krishnair) 5 years ago
0

i wrote bhramo instead of brahmo - any hope of marks

+ 3 more questions by teleansh  

Should we learn speed and mass of alpha beta gamma
asked by Ansh Anand (teleansh) 5 years ago
0

If colour of wires is asked we have to write old convection or new convection or both are correct
asked by Ansh Anand (teleansh) 5 years ago
2

1) At which points does resonance is heard (i read somewhere there are 3 situations etc.) 2) is frequency directly proportional to square root of radius or proportional to of radius ? 3) Factors affecting Critical Angle. (i think refractive index and wavelength of light is appropriate but in my book instead of R.I. temperature is given)
asked by Ansh Anand (teleansh) 5 years ago
1

Guys just to share a fact that in lens diagrams 
Remember we have to erase those extra lines after intersection of light rays else  a hollow image will be formed (this is an error given in Selina book)

what is the principle of a magnifying glass

Someone please explain pg 240 example 1 (ii)

Are questions repeated in physics?

What are the energy changes in a soldering iron in use?

If its given to find the focal length when power is -2D, will the answer be in negative since it is a convex lens or what?

in physics,which chapters is most important?

how can i make coefficient of friction 0?