A simple magnifying glass is used to view an object. At w...
A simple magnifying glass is used to view an object. At what distance from the lens must the object be placed so that an image 5 times the size of the object is produced 20cm from the lens?
2cm
4cm
15cm
25cm
100cm
Correct answer is B
No explanation has been provided for this answer.
Primary colours of light are ...
The energy stored in a spring of stiffness constant k = 2000Nm−1 when extended 4cm is...
Which of the following is an example of a couple? ...
Which of the following materials has an increase in resistance with temperature? ...
One special advantage of alcohol over mercury as a thermometric liquid is its? ...