Lala Lajpath Rai
Lala Lajpath Rai along with Madan Mohan Malavya founded the Nationalist Party
- Speed of light is maximum in vaccum.
- Shaped diamond shines due to high refractive index and total internal refraction.
- Candela is the unit of luminous intensity.
- Power of lenses is measured in diopter.
- Longitudinal waves cannot be polarised.
- If an object placed between two parallel mirrors than infinite objects will be formed.
- Rainbow always formed in a direction opposite to the sun.
- Lumen is unit of luminous index.
- The frequency of visible light varies between 400nm to 700nm
- Colour blindness was first discovered by Horner
- Focal distance of lens is maximum for red-light and minimum for violet light.
- 3D image is known as hologram
- If a transparent material is invisible in any liquid then both of them have the same refractive index.
- Magnifying glass is convex lens of small focal length.
- If two mirrors are at an angle of 75 degree then the number of images is 5.
- Human eyes have convex lens.
- Raman effect is related to scattering.
- For glass palate having refractive index 1.54 polarising angle is 57 degree.