Question
Explain why, we cannot see our surroundings clearly when we enter a darkened cinema hall from bright sunshine but our vision improves after some time.
✓
Answer
In bright sunshine the size of the pupil of the eye is very small so when we enter a darkened cinema hall from bright sunshine very little amount of light enters the eye. The vision improves at some time later because the pupil dilates and more amount of light enters the eye easily.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Define it: Biodiversity.
Why we have to add a little curd to warm milk to set curd for next day?
State the various measures which can be taken to control $($or reduce$)$ noise pollution in our surroundings.
→Boojho saw a cracker burst at night at a distance from his house. He heard the sound of the cracker a little later after seeing the cracker burst. Give reason for the delay in hearing the sound.
Cell theory was reined in $1855.$ Name the scientist who is credited for it.
→ Why are treads made in the surface of tyres?
Three mirrors-plane, concave, and convex, are placed in the Figure. Based on the images of the graph sheet formed in the mirrors, identify the mirrors and write their names above the mirrors.
Out of sliding friction, static friction and rolling friction:
$i.$ Which one is the smallest?
$ii.$ Which one is the largest?
→$i.$ Which one is the smallest?
$ii.$ Which one is the largest?
Classify the following crops into Kharif and Rabi crops and write in the tabular column given below. Maize, paddy, mustard, pea, gram, wheat, groundnut, cotton .
| Kharif | Rabi |
| ____________ | ____________ |
| ____________ | ____________ |
| ____________ | ____________ |
| ____________ | ____________ |
What is metamorphosis ? Give examples.