MCQ Practice – Class 6 to 10

← Back

Quiz – The Human Eye and the Colourful World

Time: 00:00

Q1. Which part of the eye controls the size of the pupil?

A. Retina B. Cornea C. Lens D. Iris

Q2. The rainbow is formed due to:

A. Reflection B. Interference C. Diffraction D. Refraction and dispersion

Q3. Which colour scatters the least?

A. Green B. Violet C. Blue D. Red

Q4. The blue colour of the sky is due to:

A. Reflection B. Scattering C. Refraction D. Absorption

Q5. The power of a convex lens is:

A. Zero B. Positive C. None D. Negative

Q6. The ability of the eye lens to adjust its focal length is called:

A. Refraction B. Accommodation C. Dispersion D. Power

Q7. Which cells help in dim-light vision?

A. None B. Rods C. Both rods and cones D. Cones

Q8. Which defect occurs with ageing due to reduced flexibility of lens?

A. Astigmatism B. Myopia C. Presbyopia D. Hypermetropia

Q9. What is the near point of an old person with presbyopia?

A. 10 cm B. More than 25 cm C. 25 cm D. Less than 25 cm

Q10. The phenomenon causing the apparent flattening of the Sun at sunset is:

A. Interference B. Reflection C. Atmospheric refraction D. Dispersion