What is the **law of reflection**?
A
Angle of incidence is greater than angle of reflection
B
Angle of incidence is equal to angle of reflection
C
Light travels in a curve
D
Angle of incidence is always 90°
Analysis & Theory
According to the law of reflection, the angle of incidence is **equal to** the angle of reflection.
Which of the following surfaces gives a **regular reflection**?
Analysis & Theory
A **polished mirror** gives a regular reflection because it has a smooth surface.
What is the angle between the incident ray and the reflected ray if the angle of incidence is 30°?
Analysis & Theory
Angle of reflection = angle of incidence = 30°, so the total angle between rays is 30° + 30° = **60°**.
Which device works on the principle of reflection of light?
Analysis & Theory
A **periscope** uses mirrors to reflect light, allowing us to see over or around obstacles.
In a **plane mirror**, the image formed is:
B
Virtual and laterally inverted
Analysis & Theory
Plane mirrors form **virtual, erect, and laterally inverted** images.
Which of the following is true about the image formed in a plane mirror?
A
It can be formed on a screen
B
It is larger than the object
C
It is at the same distance behind the mirror as the object is in front
Analysis & Theory
In a plane mirror, the image appears to be at the **same distance behind the mirror** as the object is in front.
What type of reflection occurs from a **rough surface**?
B
Total internal reflection
Analysis & Theory
A **rough surface** causes **diffuse reflection**, scattering light in different directions.
If the angle of incidence is 0°, what will be the angle of reflection?
Analysis & Theory
If light hits the mirror **perpendicularly (0° incidence)**, it reflects back along the same path: **0° reflection**.
Which of the following statements is **true** about reflection?
A
Light always passes through objects
B
Only transparent objects reflect light
C
Smooth surfaces reflect light regularly
D
Reflection does not depend on surface type
Analysis & Theory
**Smooth surfaces** like mirrors cause **regular reflection** of light.
Which angle is measured **from the normal** in reflection?
C
Angle of incidence and reflection
Analysis & Theory
Both **angle of incidence** and **angle of reflection** are measured from the **normal** line to the surface.