Question:medium
The part of human eye which controls the amount of light entering into it is:
The part of human eye which controls the amount of light entering into it is:
Show Hint
The iris is a colored part of the eye and controls the dilation and constriction of the pupil to control light intake.
Updated On: Feb 6, 2026
- Iris
- Cornea
- Ciliary muscles
- Pupil
{5pt}
Show Solution
The Correct Option is A
Solution and Explanation
Step 1: Structure identification. The iris, which regulates pupil size, manages the light entering the eye.
Step 2: Answer. Therefore, the correct choice is option (A): Iris.
Was this answer helpful?
0
Top Questions on Optics
- Some distant star is to be observed by some telescope of diameter of objective lens \(a\), at an angular resolution of \(3.0 \times 10^{-7}\) radian. If the wavelength of light from the star reaching the telescope is 500 nm, the minimum diameter of the objective lens of the telescope is ________ cm.
- JEE Main - 2026
- Physics
- Optics
- A compound microscope is designed with two symmetric biconvex lenses. The objective lens is cut vertically, creating two identical plano-convex lenses. One of them is used in place of original objective lens. To retain same magnification keeping the object distance unchanged, the tube length has to be:
- JEE Main - 2026
- Physics
- Optics
- A telescope with objective diameter \(R\) is used to observe a distant star emitting light of wavelength 500 nm, at a resolution of \(5 \times 10^{-7}\) radian. The value of \(R\) is ________ cm.
- JEE Main - 2026
- Physics
- Optics
- In a YDSE experiment, a sheet of thickness \( t \) and \( \mu = 1.56 \) is introduced at a slit. The central maxima shifts to the position of the \( 7^{\text{th}} \) maxima. The wavelength of light is 480 nm. If \( t = x \, \mu\text{m} \), find the value of \( x \).
- JEE Main - 2026
- Physics
- Optics
- Want to practice more? Try solving extra ecology questions todayView All Questions
