Science True-False

Astigmatism is corrected by cylindrical lenses.

For a normal human eye, the value of far point is 25 cm.

Pupil of human eye bends the incident light on to the lens.

When an object is placed at finite distance from the concave lens a virtual image is formed between optical centre and focus of the concave lens.

In front of a convex lens when the object is placed at infinity the formed image is smaller than that of the object.

The lines in Raman scattering having frequencies lower than the incident frequency are called Antistoke’s lines.

Mie scattering takes place when the diameter is larger than the wavelength of the incident light.

According to Rayleigh’s scattering law, red colour is scattered to a greater extent than blue colour.

Tyndall scattering, is the scattering of light by colloids.

The refractive index of a medium ¡s independent of wavelength.

For red colour angle of refraction is the least.

Velocity of light is greater in rarer medium is greater than that in denser medium.

In refraction incident ray, refracted ray and normal lie in the same plane.

All coloured light has same wavelength.

Light does not travel along a straight line.

Astigmatism is corrected by cylindrical lenses.

For a normal human eye, the value of far point is 25 cm.

Pupil of human eye bends the incident light on to the lens.

When an object is placed at finite distance from the concave lens a virtual image is formed between optical centre and focus of the concave lens.

In front of a convex lens when the object is placed at infinity the formed image is smaller than that of the object.

The lines in Raman scattering having frequencies lower than the incident frequency are called Antistoke’s lines.

Mie scattering takes place when the diameter is larger than the wavelength of the incident light.

According to Rayleigh’s scattering law, red colour is scattered to a greater extent than blue colour.

Tyndall scattering, is the scattering of light by colloids.

The refractive index of a medium ¡s independent of wavelength.

For red colour angle of refraction is the least.

Velocity of light is greater in rarer medium is greater than that in denser medium.

In refraction incident ray, refracted ray and normal lie in the same plane.

All coloured light has same wavelength.

Light does not travel along a straight line.