Advertisements
Advertisements
Question
Why does the sun appear bigger during sunset or sunrise?
Solution
During sunset or sunrise, the rays of light from the sun travel through a long distance through air. Thus, the apparent image of the sun is formed closer to the eye, which in turn appears bigger.
APPEARS IN
RELATED QUESTIONS
Explain how spectrum is formed.
Explain how the formation of a rainbow occurs.
Write a relationship between the angle of incidence and angle of refractions for a given pair of media
For which colour of white light, is the refractive index of a transparent medium the most?
In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.
- Complete the path of the ray till it emerges out of the slab.
- In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r?
- Mark angles of emergence by the letter e. How are the angles i and e related?
- Which two rays are parallel to each other? Name them.
- Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.
The diagram alongside shows the refraction of a ray of light from air to a liquid.
- Write the values of (i) angle of incidence, (ii) angle of refraction.
- Use Snell’s law to find the refractive index of liquid with respect to air.
Complete the ray diagram showing its emergence into the air after passing through the prism.
A ray of light is incident at an angle of 45° on one face of a rectangular glass slab of thickness 10 cm and refractive index 3/2. Calculate the lateral shift produced ______.