Science True-False

Concave lens is used to see distant objects.

Sunrise seems to have taken place two minutes later than actual sunrise.

Passengers flying at high altitudes see the sky with intense blue colour.

While seeing nearby objects through hypermetropic eye, image falls on backside of retina.

Optic nerves send electrical signals to brain.

According to the New Cartesian sign convention for every mirror and lens, Object distance is taken as negative.

At least, four rays are required to obtain the position of an image formed by a mirror.

The diameter of the reflecting surface of a spherical mirror is known as the aperture of the mirror.

Laws of reflection are not applicable to a rough and irregular surface.

Laws of reflection are applicable to any type of mirror.

In case of irregular reflection, the beam of reflected light remains parallel in a specific direction.

The central part of a thin lens made of glass works as a rectangular glass slab.

When a ray of light enters from an optically denser medium to an optically rarer medium, its speed decreases.

Air is optically denser than water.

If an object is kept at infinite distance from concave mirror, the image is formed at the centre of curvature of the mirror.

A virtual image can be obtained on a screen.