Physics

Assertion : A total reflecting prism is used to erect the inverted image without deviation. Reason: Rays of light incident parallel to base of prism emerge out as parallel rays. Assertion : A total reflecting prism is used to erect the inverted image without deviation. Reason: Rays of light incident parallel to base of prism [...]

Assertion: A red coloured object appears dark in the yellow light. Reason : The red colour is scattered less. Assertion: A red coloured object appears dark in the yellow light. Reason : The red colour is scattered less. November 13, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions [...]

Assertion : A double convex lens (μ = 1.5) has focal length 10 cm. When the lens is immersed in water (μ = 4/3), its focal length becomes 77 cm. Reason : 1/f = (μv − μm/μm)(1/R1−1/R2) Assertion : A double convex lens (μ = 1.5) has focal length 10 cm. When the lens is [...]

Assertion: If a convex lens is kept in water its convergent power decreases. Reason: Focal length of convex lens in water increases. Assertion: If a convex lens is kept in water its convergent power decreases. Reason: Focal length of convex lens in water increases. November 13, 2020 Category: AIIMS Last 24 Years Solved 1996 - [...]

Assertion : For the sensitivity of a camera, its aperture should be reduced. Reason : Smaller the aperture, larger is its power. Assertion : For the sensitivity of a camera its aperture should be reduced. Reason : Smaller the aperture larger is its power. November 13, 2020 Category: AIIMS Last 24 Years Solved 1996 - [...]

Assertion : Endoscopy involves use of optical fibres to study internal organs. Reason : Optical fibres are based on phenomenon of total internal reflection. Assertion : Endoscopy involves use of optical fibres to study internal organs. Reason : Optical fibres are based on phenomenon of total internal reflection. November 13, 2020 Category: AIIMS Last 24 [...]

Assertion: The frequencies of incident, reflected and refracted beam of monochromatic light incident from one medium to another are same. Reason: The incident, reflected and refracted rays are coplanar. Assertion: The frequencies of incident reflected and refracted beam of monochromatic light incident from one medium to another are same. Reason: The incident reflected and refracted [...]

Assertion: A normal human eye can clearly see all the objects beyond a certain minimum distance. Reason: The human eye has the capacity to suitably adjust the focal length of its lens to a certain extent. because One cannot see through fog November 13, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics [...]

Assertion: The rainbow is seen sometimes in the sky when it is raining. When one sees a rainbow, one’s back is towards the Sun. Reason: Internal reflection from water droplet causes dispersion. The final ray is in the backward direction. Assertion: The rainbow is seen sometimes in the sky when it is raining. When one [...]

Assertion: A single lens produces a coloured image of an object illuminated by white light. Reason: The refractive index of the material of lens is different for different wavelengths of light. Assertion: A single lens produces a coloured image of an object illuminated by white light. Reason: The refractive index of the material of lens [...]