Question

The process by which the eye changes the focal length of the eye lens so as to always obtain the image at the retina is called

• A. accommodation
• B. dispersion
• C. scattering
• D. total internal reflection

Answer 1

The correct option is A

accommodation

Explanation for correct answer

Correct Answer- A

Accommodation- The eye's capacity to adapt its focal length, allowing rays from far away as well as close objects to focus clearly on the retina, is known as accommodation.

1. The ability of the eye lens to focus close and far objects clearly on the retina by altering its focal length is known as accommodation power.
2. The eye's accommodation power is limited.
3. It means that the eye lens' focal length cannot be decreased below a particular minimum.

Explanation for incorrect answers

Option B- Dispersion

1. Dispersion is the splitting of visible light into its various colors.

Option C- Scattering

1. The scattering of light is the phenomenon by which a beam of light is redirected in different directions on interacting with the particles present in the medium.
2. The sky appears blue because the fine particles in the atmosphere scatter blue light the most among all the components of white light.

Option D- Total internal reflection

1. Total internal reflection is an optical phenomenon in which waves arriving at the interface between two mediums are entirely reflected back into the first medium rather than refracted into the second.

Hence, the correct answer is option (A) accommodation.