Lala Lajpath Rai
Lala Lajpath Rai along with Madan Mohan Malavya founded the Nationalist Party
- In a pin-hole camera, the image is always at focus, real, inverted and usually smaller than the object.
- If the size of the pin-hole is increased, the image becomes blurred.
- When the object is moved towards the pin-hole camera, the size of the image decreases but its luminosity increases.