NCERT Class 10 Science Chapter 10 The Human Eye and the Colourful World Solutions
NCERT Class 10 Science Chapter 10 The Human Eye and the Colourful World Solutions The Human Eye and Colourful World NCERT TEXTBOOK Solutions for Class 10 Science Q1. The human eye can focus on objects at different distances by adjusting the focal length of the eye lens. This is due to (a) presbyopia (b) accommodation (c) near-sightedness (d) far-sightedness Answer: (b) accommodation. Q2. The human eye forms the image of an object at its (a) cornea (b) iris (c) pupil (d) retina Answer: (d) retina. Q3. The least distance of distinct vision for a young adult with normal vision is about (a) 25 m (b) 2.5 cm (c) 25 cm (d) 2.5 m Answer: (c) 25 cm. Q4. The change in focal length of an eye lens is caused by the action of the (a) pupil (b) retina (c) ciliary muscles (d) iris Answer: (c) ciliary muscles. Q5. A person needs a lens of power -5.5 dioptres for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 dioptre. What is the focal length of the lens ...