Why does the sky sometimes appear whitish?

Q: When the volume of an illuminated spherical object is doubled, the luminous flux is quadrupled. Truo

A: Ans is False

Q: Show that it is possible to position a convex rock of surface area S in sunlight in such a way that…

A: For simplicity we assume the shape of convex lens is sphere. Then is surface area is S= 4πr2.....(1)

Q: When ordinary light is inclined at an oblique angle upon water, what can you say about the reflected…

A: Unpolarized light contains polarization in all the directions, which means the unpolarised light has…

Q: When white light goes from air into water, the color that refracts the most is   Question options:…

A:

Q: why does water appears to be cyan in colour?

A: Scattering is defined as the atoms or molecules which are exposed to light absorb light energy and…

Q: The colored wings of many butterflies are due to pigmentation, but in others, such as the Morpho…

A: The colored wings of morpho-butterflies are due to the iridescence.

Q: In glass, which end of the visible spectrum has the smallest criti- cal angle for total internal…

A: Refraction is the bending of light in an optically dense medium when it enters from an optically…

Q: In which medium does light travel faster: thin air or dense air? How does this affect the period of…

A: The relation between the light’s speed (vmed) in medium, light’s speed (vvac) in a vacuum, and the…

Q: The color of the setting sun should apply equally well to the rising sun, since sunlight travels the…

A: Scattering of light depends on size and quantity of particles. At the time of evening, atmosphere is…

Q: Give two reasons (explaining in physical terms) to explain why wet hair looks darker than dry hair

A: This is the basic phenomenon behind this is the reflection of light. When a body absorb more light…

Q: what colour light is transmitted through a piece of red glass?

A: When white light passes through the piece of red glass. Green and blue light is absorbed by the…

Q: 1. What will be the relationship of the angle of incidence with the angle of reflection for light…

A: According to the laws of reflection Angle of incidence is equal to the angle of reflection for the…

Q: A surface 2 feet from a light source is illuminated by a light source having a candle power of 20…

A:

Q: If you look through a piece of very fine fabric at a tiny white light source, you will see a rainbow…

A: A very fine fabric

Q: Why the Sun and the surrounding sky appears red during Sunrise and Sunset?

A: Sunlight consists of different color with different wavelength which get scattered by the small…

Q: The three colors that comprise the image of full-color photos are    options:   red, green, and…

A: The correct option is, d) Magenta, Cyan, Yellow

Q: This beam of light has a 65 degree angle of incidence, and a 39 degree angle of refraction.…

A:

Q: Consider an opaque body capable of absorbing blue light and illuminated by (a) white light and (b)…

A: (a) In white light only blue will be absorbed and other colors will be reflected. What we will see…

Q: The law of reflection applies only to surfaces that are smooth on the scale of the wavelength of…

A: Ans is True

Dispersion of White Light

Snell’s law is a formula that gives a relation between the angle of incidence and angle of refraction and is given as: