When a red rose flower is observed in blue light, what co...
When a red rose flower is observed in blue light, what colour does the observer see?
Red
Blue
Magenta
yellow
No correct option
Correct answer is E
The colour which an object presents to the eye is the colour of light it reflects. Red rose flower will therefore absorb any other colour and reflect red. Therefore when viewed in blue light, it has no colur to reflect and will therefore appear black. Although mixture of red light and blue light = magenta .
Given three capacitors 0.3μF, 0.5μF and 0.2μF, the joint capacitance when arranged to give minimu...
An a.c. the generator can be converted to a d.c. generator by replacing the ...
At what frequency would a 10H inductor have a reactance of 2000Ω? ...
Which of the following types of waves cannot travel through a vacuum? ...
A man walks 1km due east and then 1km due north. His displacement is ...
What is the difference between a crystalline and an amorphous solid? A crystalline solid ...