Adaptive Practice
Light — Reflection and Refraction
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Question 1 of 10
⏱ 0:30
Easy
What is the angle of incidence when a ray of light strikes a plane mirror at 30° to the surface?
Easy
Which of the following is true for the reflection of light from a plane mirror?
Medium
A ray of light passes from air to glass (refractive index = 1.5). If the angle of incidence is 30°, what is the angle of refraction? (Use sin 30°=0.5, sin θ = ?)
Easy
Which phenomenon explains the apparent bending of a stick partially immersed in water?
Medium
The refractive index of a medium is 1.33. What is the speed of light in this medium? (Speed of light in vacuum = 3 × 10^8 m/s)
Hard
When light passes from a denser to a rarer medium, which of the following can occur?
Hard
What is the critical angle for water (refractive index = 1.33) when light passes from water to air?
Easy
Which mirror is used as a rear-view mirror in vehicles and why?
Hard
A concave mirror forms a real image of size 4 cm at a distance of 20 cm from the mirror. If the object is 30 cm away, what is the focal length of the mirror?
Easy
Why does a pencil appear broken or bent when partially immersed in water?