Q1 · medium · AI-verified
Which phenomenon is responsible for the blue colour of the sky?
- Interference of light
- Total internal reflection
- Rayleigh scattering
- Diffraction of light
Q2 · medium · AI-verified
A ray of light travelling in glass (n = 1.5) hits the glass-air interface. If the critical angle is 42°, what happens when the angle of incidence is 50°?
- Total internal reflection occurs
- The ray is absorbed
- Partial refraction and partial reflection both occur
- The ray refracts into air
Q3 · hard · AI-verified
A ray of light is incident on a glass slab of refractive index √3 at the polarizing angle. What is the angle of refraction inside the slab?
- 60°
- 30°
- 45°
- 35.26°
Q4 · easy · AI-verified
Which colour of light has the highest speed in a glass medium?
- Yellow
- Green
- Violet
- Red
Q5 · medium · AI-verified
A convex lens of focal length 20 cm forms an image of an object placed 30 cm from the lens. What is the image distance?
- 40 cm
- 60 cm
- −60 cm
- 12 cm