Class 8 General Science Notes: - Unit-9- Reflection and Refraction of Light ( Solved Exercise MCQs)

Unit-10- Reflection and Refraction of Light ( Solved Exercise MCQs)

(National Book Foundation - New Book/New Syllabus Based on National Curriculum Pakistan 2023-2024 and Onwards)

(Class 8 General Science Notes for 8th Centralized Exam 2023-2024 and onward, FDE, Islamabad)

A. MCQs (Choose the Correct Answers).

1. A ray of light is incident toward a plane mirror at an angle of 30- degrees with the mirror surface. What will be the angle of reflection?

a. 30°
b. 60°
c. 90°
d. 45°

... Answer is a. 30°
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2. If the angle of incidence is 45°, then what will be the angle of reflection?

a. 0°
b. 45°
c. 90°
d. 180°

... Answer is b. 45°
-----------------

3. Which letter after reflection from a plane mirror will remain unchanged?

a. K
b. E
c. M
d. J

... Answer is c.  M
-----------------

4. When light enters from the air to water it

a. continue its path as a straight line.
b. bends toward the normal.
c. bends away from the normal.
d. reflects totally.

... Answer is b.  bends toward the normal.
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5. The light passing from air to glass will cause the speed of light to

a. remain the same.
b. increase.
c. decrease.
d. reduce to zero.

... Answer is c. decrease.
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6. For concave mirror real and inverted image of the same size is formed when an object is

a. beyond centre of curvature.
b. at centre of curvature.
c. between centre of curvature and focus point.
d. at focus point.

... Answer is b. at centre of curvature.
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7. For concave mirror, no image is formed when an object is

a. beyond centre of curvature.
b. at centre of curvature.
c. between centre of curvature and the focus point.
d. at focus point.

... Answer is d. at focus point.
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8. To get an enlarged and upright image, which mirror we should use

a. convex mirror.
b. concave mirror.
c. plane mirror.
d. rough mirror.

... Answer is b.  concave mirror.
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9. The Figure shows the plane mirror image of the clock the correct time is 

a. 2:35
b. 3:25
c. 8:05
d. 9:25

... Answer is a.  2:35
---------------

10. A dentist uses a small dental mirror to help magnify teeth in your mouth. This mirror can be a 

a. convex mirror.
b. plane mirror.
c. concave mirror.
d. all of these

... Answer is c.  concave mirror.
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