Light Practice Questions
Class 8 · Science · 1097 free MCQs with instant results and detailed explanations.
1097
Total
363
Easy
520
Medium
214
Hard
Start Practicing Light
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Topics in Light
Visually Impaired
231
Human Eye
244
Braille
238
Reflection
225
Multiple Images
159
Sample Questions from Light
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What occurs when light hits a smooth surface and bounces back?
A.
Refraction
B.
Reflection
C.
Diffraction
D.
Absorption
Show Answer & Explanation
Correct Answer: B
When light hits a smooth surface, it bounces back in the same way it came, which is known as reflection. This principle is what allows us to see images in mirrors.
Q2
Easy
What is the angle of incidence when a ray of light strikes a mirror at an angle of 30 degrees?
A.
30 degrees
B.
60 degrees
C.
90 degrees
D.
45 degrees
Show Answer & Explanation
Correct Answer: A
The angle of incidence is the angle between the incoming ray and the normal. If it strikes at 30 degrees, that is the angle of incidence.
Q3
Easy
Which surface is best for reflection of light?
A.
Rough surface
B.
Smooth surface
C.
Transparent surface
D.
Opaque surface
Show Answer & Explanation
Correct Answer: B
Smooth surfaces reflect light in an organized manner, providing clear images, while rough surfaces scatter light.
Q4
Medium
When a ray of light strikes a plane mirror at an angle of 30 degrees to the normal, what will be the angle of reflection?
A.
30 degrees
B.
60 degrees
C.
90 degrees
D.
45 degrees
Show Answer & Explanation
Correct Answer: A
According to the law of reflection, the angle of incidence is always equal to the angle of reflection. Therefore, if the angle of incidence is 30 degrees, the angle of reflection will also be 30 degrees.
Q5
Medium
What type of mirror is used in a car to provide a wider field of view?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Spherical mirror
Show Answer & Explanation
Correct Answer: C
A convex mirror diverges light rays, allowing drivers to see a broader area behind them, which enhances safety.
Q6
Medium
When light reflects off a surface, which law governs the angle of incidence and angle of reflection?
A.
Law of Refraction
B.
Law of Reflection
C.
Snell's Law
D.
Law of Reflection and Refraction
Show Answer & Explanation
Correct Answer: B
The law of reflection states that the angle of incidence is equal to the angle of reflection when light reflects off a surface.
Q7
Medium
Which of the following surfaces is best suited for making a plane mirror?
A.
Rough surface
B.
Smooth metal surface
C.
Textured glass
D.
Frosted glass
Show Answer & Explanation
Correct Answer: B
A smooth metal surface reflects light uniformly, creating a clear image, which is essential for a plane mirror.
Q8
Hard
What happens to a light ray when it strikes a plane mirror at an angle of incidence of 30 degrees?
A.
It reflects at an angle of 30 degrees.
B.
It reflects at an angle of 60 degrees.
C.
It reflects at an angle of 90 degrees.
D.
It is absorbed by the mirror.
Show Answer & Explanation
Correct Answer: A
According to the law of reflection, the angle of incidence is equal to the angle of reflection.
Q9
Hard
Which of the following statements about the angle of reflection is correct?
A.
It is always less than the angle of incidence.
B.
It is always greater than the angle of incidence.
C.
It is equal to the angle of incidence.
D.
It varies depending on the material of the mirror.
Show Answer & Explanation
Correct Answer: C
The angle of reflection is defined to be equal to the angle of incidence, as per the law of reflection.
Q10
Hard
A light ray strikes a horizontal plane mirror at an angle of incidence of 45 degrees. What is the angle of reflection?
A.
45 degrees
B.
90 degrees
C.
135 degrees
D.
60 degrees
Show Answer & Explanation
Correct Answer: A
According to the law of reflection, the angle of reflection equals the angle of incidence.
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Other Class 8 Subjects
Light — Class 8 Science Practice Questions Online
This page contains 1097 practice MCQs for the chapter Light in Class 8 Science. The questions are organized by difficulty — 363 easy, 520 medium, 214 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.