Question 1 Define optical centre? Question 2 Define principal focus? Question 3 Define focal length? Question 4 Define principal foci? Question 5 Define first focal plane? Question 6 Define first principal focus? Question 7 Define second principal focus? Question 8 What do you mean by aperture of lens? Question 9 What are converging lenses? Question … [Read more...] about Lenses
Light-Reflection and Refraction
Refraction by spherical lenses
Question 1 What is a lens? Question 2 How many type of lens are them? Question 3 What is a convex lens? Question 4 What is a concave lens? Question 5 Draw Bi-convex,plane-convex and concavo-convex lens? Question 6 Draw Bi-concave,plane-concave and convexo-concave lens? Refraction by spherical lenses Lens is a transparent medium bounded by two refracting … [Read more...] about Refraction by spherical lenses
Refraction of light
Question 1 Define the term refraction of light? Question 2 Draw a diagram showing the bending of a ray of light when it travels from a rare medium to a denser medium? Question 3 State two laws of refraction? Question 4 What is the cause of refraction of light? Refraction of light The phenomenon of bending of light when they pass from one medium to another medium … [Read more...] about Refraction of light
Images formed by Concave lens
Question 1 What are the sign conventions for measuring the distances for spherical lens? Question 2 The image formed by concave lens is seen to be virtual,erect and highly diminished than the object.What is the position of the object? Question 3 Where should an object be placed in front of a concave lens so as to obtain image between focus and optical centre? Images … [Read more...] about Images formed by Concave lens
Images formed by convex lens
Question 1 Where should an object be placed in front of a convex lens so as to obtain image on same side of lens? Question 2 The image formed by convex lens is seen to be real,inverted and diminished.What is the position of the object? Question 3 The image formed by convex lens is seen to be real,inverted and highly magnified.What is the position of the object? Image … [Read more...] about Images formed by convex lens