Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board chapter 2 - Optics [Latest edition]

The refractive index of four substances A, B, C, and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in

Where should an object be placed so that a real and inverted image of the same size is obtained by a convex lens?

A small bulb is placed at the principal focus of a convex lens. When the bulb is switched on, the lens will produce

Magnification of a convex lens is

A convex lens forms a real, diminished point-sized image at focus. Then the position of the object is at

Power of a lens is – 4D, then its focal length is

In a myopic eye, the image of the object is formed

The eye defect ‘presbyopia’ can be corrected by

Which of the following lens would you prefer to use while reading small letters found in a dictionary?

If V_B, V_G, V_R be the velocity of blue, green, and red light respectively in a glass prism, then which of the following statement gives the correct relation?

The path of the light is called as ______.

The refractive index of a transparent medium is always greater than ______.

If the energy of incident beam and the scattered beam is the same, then the scattering of light is called as ______ scattering.

According to Rayleigh’s scattering law, the amount of scattering of light is inversely proportional to the fourth power of its ______.

Amount of light entering into the eye is controlled by ______.

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

The power of lens depends on the focal length of the lens

Increase in the converging power of eye lens cause ‘hypermetropia'

The convex lens always gives small virtual image.

Match the following:

Assertion and reasoning type

1. Assertion: If the refractive index of the medium is high (denser medium) the velocity of the light in that medium will be small
2. Reason: Refractive index of the medium is inversely proportional to the velocity of the light

Assertion and reasoning type

1. Assertion: Myopia is due to the increase in the converging power of eye lens.
2. Reason: Myopia can be corrected with the help of concave lens.

What is refractive index?

State Snell’s law.

Draw a ray diagram to show the image formed by a convex lens when the object is placed between F and 2F.

Define dispersion of light.

State Rayleigh’s law of scattering.

Differentiate convex lens and concave lens.

What is power of accommodation of eye?

What are the causes of ‘Myopia’?

Why does the sky appear in blue colour?

Why are traffic signals red in colour?

List any five properties of light.

Explain the rules for obtaining images formed by a convex lens with the help of ray diagram.

Differentiate the eye defects: Myopia and Hypermetropia

Explain the construction and working of a ‘Compound Microscope’.

An object is placed at a distance 20cm from a convex lens of focal length 10cm. Find the image distance and nature of the image.

An object of height 3cm is placed at 10cm from a concave lens of focal length 15cm. Find the size of the image.

While doing an experiment for the determination of focal length of a convex lens, Raja Suddenly dropped the lens. It got broken into two halves along the axis. If he continues his experiment with the same lens,

1. can he get the image?
2. Is there any change in the focal length?

The eyes of the nocturnal birds like owls are having a large cornea and a large pupil. How does it help them?