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Optics
Lightwaves travel from the air into a lens made of glass. Their velocity decreases as they enter the glass. How does this affect the frequency and wavelength of the lightwaves
Optics
The contacts worn by a farsighted person allow her to see objects clearly that are as close as 25.0 cm, even though her uncorrected near point is 89.0 cm from her eyes. When she is looking at a poster, the contacts form an image of the poster at a distance of 155 cm from her eyes. (a) How far away is the poster actually located? (b) If the poster is 0.390 m tall, how tall is the image formed by the contacts?
Optics
why center of newtons ring is dark?
Optics
Hoe do we get comparitive masses with the help of common balance?
Optics
If light travels in a straight line, why a rainbow appears curved?
Optics
Diffraction will be best if the gap is equal to the wave length, but what
will be if the gap is smaller than the wave length?
will be if the gap is smaller than the wave length?
Optics
Hi! Just wondering whether the lux measured in an isolated room will vary due to inconsistent luminosity of the rooms lighting (fluorescent).
Optics
A spherical concave lens has a focal length of 20 cm, and an object is placed 15 cm from the lens. What are the image distance and the image characteristics?
Optics
A ray of light is incident on a polarizer then the polarizer is rotated.& What will be the intensity of resultant light ?
Optics
what is black body and its radiation ?
