Dispersion of Light Short Question With Answer: General Science Cadet College Test
[toggle title=”Q.No.01: What is refraction?” state=”close”] Ans: Refraction is the bending of light when it passes from one transparent material to another. [/toggle]
[toggle title=”Q.No.02: When does light not change its direction?” state=”close”] Ans: When light falls straight (perpendicular) on a surface, it does not change direction. [/toggle]
[toggle title=”Q.No.03: What are two effects of refraction?” state=”close”] Ans: Rainbow is formed.
Eyes form images on the retina using refraction. [/toggle]
[toggle title=”Q.No.04: When is the angle of refraction greater than the angle of incidence?” state=”close”] Ans: When light moves from water or glass to air, it bends away from the normal. Then, the angle of refraction becomes greater than the angle of incidence. [/toggle]
[toggle title=”Q.No.05: What is incident and refracted ray?” state=”close”] Ans: Incident Ray: Light ray that hits the surface.
Refracted Ray: Light ray that bends in the second material. [/toggle]
[toggle title=”Q.No.06: What is the difference between angle of incidence and angle of refraction?” state=”close”] Ans: Angle of incidence is the angle between the incoming light and the normal line.
Angle of refraction is the angle between the bent light and the normal line. [/toggle]
[toggle title=”Q.No.07: What is refractive index?” state=”close”] Ans: It tells how much a material can bend light. [/toggle]
[toggle title=”Q.No.08: What is critical angle?” state=”close”] Ans: The smallest angle of incidence at which light bends 90° is called the critical angle. [/toggle]
[toggle title=”Q.No.09: What is total internal reflection?” state=”close”] Ans: When light hits the surface at an angle greater than the critical angle, it reflects back into the same material. [/toggle]
[toggle title=”Q.No.10: What is a prism?” state=”close”] Ans: A prism is a glass block with 3 rectangle and 2 triangle surfaces. It has one 90° and two 45° angles. [/toggle]
[toggle title=”Q.No.11: Why does a pencil look bent in water?” state=”close”] Ans: Light from the pencil bends as it moves from water to air, making the pencil appear bent. [/toggle]
[toggle title=”Q.No.12: How does refraction help in lenses?” state=”close”] Ans: Lenses use refraction to bend light rays and focus them to form images. [/toggle]
[toggle title=”Q.No.13: What happens to light speed during refraction?” state=”close”] Ans: Light changes speed; it slows down in denser materials and speeds up in less dense materials. [/toggle]
[toggle title=”Q.No.14: Why do stars appear to twinkle?” state=”close”] Ans: Light from stars bends as it passes through layers of air with different densities, causing the twinkling effect. [/toggle]
[toggle title=”Q.No.015: What is dispersion of light?” state=”close”] Ans: Dispersion is the splitting of white light into its colors when it passes through a prism. [/toggle]
[toggle title=”Q.No.16: Which color bends the most in refraction?” state=”close”] Ans: Violet light bends the most because it has the shortest wavelength. [/toggle]
[toggle title=”Q.No.17: Why can we see the bottom of a pool more clearly than its actual depth?” state=”close”] Ans: Refraction makes the bottom appear closer to the surface than it really is. [/toggle]
[toggle title=”Q.No.018: How does refraction work in a magnifying glass?” state=”close”] Ans: The curved lens bends light rays to make objects appear larger. [/toggle]
[toggle title=”Q.No.19: Why do fish look closer in water than they are?” state=”close”] Ans: Refraction bends light from the fish toward your eyes, making it seem nearer. [/toggle]
[toggle title=”Q.No.20: How does refraction cause mirages?” state=”close”] Ans: Hot air near the ground bends light upward, making distant objects appear like they are reflected in water. [/toggle]
