Light Test - 1

The focal length of lens does not depend on

A microscope is focused on an ink mark on the top of a table. If we place a 3 cm thick glass slab on it, how should the microscope be moved to focus the ink spot again?

What are the respective minimum and maximum distances between a convex lens and an object for the magnification of a real image to be greater than 1?

It is said that the sun becomes visible before the actual rise and remains visible even after the actual setting. This makes the day a bit longer. It happens due to

What is the minimum distance between the convex lens and the object to produce a real image?

Which of the following statements is true?

Which of the following produce a virtual image smaller in size than the object?

A glass slab of thickness 4 cm contains the same number of waves as 5 cm of water when both are traversed by the same monochromatic ray of light. The refractive index of water is 4/3, what is the refractive index for glass?