CBSE Class 10 Science MCQ

A person went for a medical check-up and found that the curvature of his eye lens is increasing. Which defects he is likely to suffer from?

• myopia

• cataract

• presbyopia

• hypermetropia

A person gets out in the sunlight from a dark room. How does his pupil regulate and control the light entering in the eye?

• the size of pupil will decrease, and less light will enter the eye

• the size of pupil will decrease, and more light will enter the eye

• the size of pupil will remain same, but more light will enter the eye

• the size of pupil will remain same, but less light will enter the eye

In which part of the human eye the image of an object is formed?

• iris

• pupil

• retina

• cornea

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light

• is scattered the most by smoke or fog

• is scattered the least by smoke or fog

• is absorbed the most by smoke or fog

• moves fastest in air

Which of the following phenomena of light are involved in the formation of a rainbow?

• Reflection, refraction and dispersion

• Refraction, dispersion and total internal reflection

• Refraction, dispersion and internal reflection

• Dispersion, scattering and total internal reflection

A person is seeing an object closer to his eyes. What changes in his eyes will take place?

• the pupil size will expand

• the ciliary muscles will contract

• the focal length of eye lens will increase

• the light entering in the eye will be more

The splitting of white light into different colours on passing through a prism is called

• reflection

• refraction

• dispersion

• deviation

The image shows a light ray incident on a glass prism. The various angles are labeled in the image. Which angle shows the angle of incidence and angle of refraction, respectively?

• A and D

• B and E

• C and F

• D and F

The deflection of light by minute particles and molecules of the atmosphere in all directions is called ____________ of light.

• dispersion

• scattering

• interference

• tyndall effect

Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

• Dispersion of light

• Scattering of light

• Total internal reflection of light

• Reflection of light from the earth