Practice Human Eye RRB PYQ questions from Railway examinations, including RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. This topic-wise question set covers important concepts related to the human eye and vision that are useful for RRB Physics preparation.
The questions focus on important areas such as the structure and functions of the human eye, accommodation of the eye, near point and far point, defects of vision, myopia, hypermetropia, presbyopia, cataract, correction of vision using lenses, and basic concepts of image formation.
Human Eye RRB PYQ questions are useful for candidates preparing for RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. Solve the questions, check the explanations, and revise important concepts to improve your Physics preparation.
Start practicing Human Eye RRB PYQs and strengthen your preparation for upcoming Railway examinations.
21
Ability of the eye lens to change its focal length to see objects placed at different places is called:
✓ Answer:BPower of Accommodation
The ability of the eye lens to change its focal length according to the distance of the object is called power of accommodation. Ciliary muscles change the curvature of the lens to focus near and distant objects clearly on the retina.
22
Human eye has a near point i.e. distance of distinct vision at approximately 25 cm. For a normal eye, which of the following statements is true?
✓ Answer:BThe image formed on the retina is real, inverted and diminished.
The convex eye lens forms a real, inverted and diminished image on the retina. The brain processes this image so that we perceive objects correctly.
23
In which light produces image focus in front of the retina? Additional option E: None of the above.
✓ Answer:AMyopia
In myopia (short-sightedness), the image of a distant object is formed in front of the retina. It can occur when the eyeball is elongated or the converging power of the eye is too high. A concave lens is used for correction. The supplied question has five options; option E is preserved in question_text because this CSV has four option columns.
24
Near-sightedness can be corrected using:
✓ Answer:CConcave lens
Near-sightedness is called myopia. In myopia, light focuses in front of the retina. A concave lens diverges the incoming rays so that the image is shifted back onto the retina.
25
Far-sightedness can be corrected using:
✓ Answer:DConvex lens
Far-sightedness, or hyperopia, occurs when light would focus behind the retina. A convex lens converges the rays before they enter the eye and helps form the image on the retina.
26
Colour vision in human eyes is the function of photoreceptor cells named:
✓ Answer:BCones
Cone cells are photoreceptors responsible mainly for colour vision and detailed vision in bright light. Rods are mainly responsible for vision in dim light.
27
The thin membrane in the eye through which light enters is known as:
✓ Answer:CCornea
The cornea is the transparent front covering of the eye through which light enters. It also causes a major part of the refraction of light entering the eye.
28
The colour of the human eye depends on the pigment present in the _____ of the eye.
✓ Answer:AIris
The iris is the coloured part of the eye. The amount and distribution of melanin pigment in the iris largely determine eye colour.
29
Retina converts light:
✓ Answer:BInto electrical signal
Photoreceptor cells in the retina detect light and convert the information into electrical nerve signals. These signals are transmitted to the brain through the optic nerve.
30
The change in focal length of an eye lens is caused by the action of the ______.
✓ Answer:CCiliary muscle
Ciliary muscles control the curvature of the eye lens. When they contract, the lens becomes thicker and its focal length decreases, helping us see nearby objects. When they relax, the lens becomes flatter and its focal length increases.
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