MCQ Solution: Ray Optics
The image of an object placed at 60cm in fromt of a lens is obtained on a screen at a distance of 120 cm from it. Find the local of the lens. what would be the height of the image if the object is 5cm high ?
1) 5cm
2) −10cm
3) 10cm
4) −20cm
Solution
Object distance u=−60 Image distance v=+120 cm Using lens formula,1/f=1/v−1/u
1/f=1/120−(−1/60)
= +40 cmH(image) / H(object) = v/u Hi
=−120/60X5
=−10v/uHi
=−120/60X5
=−10cm
Latest Post
Current ElectricitySolid State
System Of Particles And Rotational Motion
P ��� Block Elements
Alternating Current