The Human Eye and Colourful World
The human eye forms the image of an object at its:
The least distance of distinct vision for a young adult with normal vision is about:
The change in focal length of an eye lens is caused by the action of the:
A person needs a lens of power -5.5 D for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 D. What is the focal length of the lens required for correcting distant vision?
The dark muscular diaphragm that controls the size of the pupil is:
The defect of vision in which a person can see distant objects distinctly but cannot see nearby objects clearly is:
Myopia is corrected by using a:
The splitting of white light into its component colors is called:
Which of the following colors bends the least when white light passes through a prism?
The blue color of the clear sky is due to: