Basics of Reflection
A ray travels towards a plane mirror and strikes it at a particular point. What is this point called?
Point of Incidence
A reflected ray makes an angle of 47° with the normal. Find the angle of incidence.
47°
Parallel incident rays fall on a rough surface. What type of reflection occurs?
Irregular Reflection
What type of mirror is used in a simple periscope?
Plane mirror
Swara sees a clear image in still water. Which type of reflection is responsible?
Regular
A student draws a ray travelling away from the mirror but labels it as the incident ray. What is the correct label?
Reflected Ray
The angle between the incident ray and reflected ray is 110°. Find the angle of reflection.
55°
True or False: The laws of reflection are followed even during irregular reflection.
True
What is the angle of inclination of each mirror to the length of a simple periscope tube?
45°
A room has no light source and no external light entering it. What essential condition for vision is missing?
Light
The angle between an incident ray and the mirror surface is 28°. What angle does the incident ray make with the normal?
62°
The angle between the incident ray and the mirror surface is 24°. Find the angle between the incident ray and reflected ray.
132°
Why do parallel incident rays travel in different directions after striking a rough surface?
Due to different Normals at Different oints
How many successive reflections occur before light reaches the observer's eye in a simple periscope?
Two
The angle between the incident and reflected rays is 90°. What is the angle between the incident ray and the mirror surface?
45°
True or False: The normal always makes an angle of 90° with the reflecting surface, irrespective of the direction of the incident ray.
True
A student records the angle of incidence as 40° and the angle of reflection as 50°. What is the difference between the measured values?
10°
A student claims that objects cannot be seen under irregular reflection because the reflected rays are not parallel. True or False?
False
Complete the path: Object → Upper mirror → ______ → Observer's eye.
Lower Mirror
A magazine page produces excessive glare under bright light. Which type of reflection is responsible for the glare?
Regular
A student measures the angle of incidence from the mirror surface instead of the normal. If the measured angle is 35°, what is the actual angle of incidence?
55°
The angle between the incident ray and reflected ray is 126°. Find the angle made by the reflected ray with the mirror surface.
27°
A smooth mirror and a rough wall are illuminated by parallel rays. Both follow the laws of reflection. Which surface produces parallel reflected rays?
Mirror
A periscope has two correctly positioned mirrors. The upper mirror is removed. How many reflections will now occur inside the periscope?
Zero
A student sees a clear image in still water, but the image becomes blurred when the water is disturbed. Which two types of reflection are involved?
Regular and irregular reflection.