Quantum Theory of Light

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What is the name of the line passing through the pole and the centre of curvature of a spherical mirror?

Principal axis (correct)

Focal line

Principal line

Central axis

What is the relationship between the principal axis and the mirror's surface?

The principal axis intersects the mirror's surface at an angle.

The principal axis is perpendicular to the mirror's surface. (correct)

The principal axis has no relationship to the mirror's surface.

The principal axis is parallel to the mirror's surface.

Why should you not look directly at the Sun or into a mirror reflecting sunlight?

It can damage your eyes. (correct)

It can cause temporary blindness.

It can cause a fire hazard.

It is illegal to look directly at the Sun.

What happens when you hold a concave mirror towards the Sun and focus the reflected light onto a sheet of paper?

The paper will begin to burn and produce smoke. Signup and view all the answers

What is the point where the reflected light from the Sun is focused by the concave mirror called?

Focal point Signup and view all the answers

How can you determine the approximate focal length of the concave mirror using the experiment?

By measuring the distance between the mirror and the paper where the bright spot appears. Signup and view all the answers

What is the magnification produced by a spherical mirror?

The ratio of the height of the image to the height of the object Signup and view all the answers

What happens when a light ray travels obliquely from a denser medium to a rarer medium?

The light ray bends away from the normal Signup and view all the answers

What is the speed of light in vacuum?

$3 \times 10^8$ m/s Signup and view all the answers

What is the refractive index of a transparent medium?

The ratio of the speed of light in vacuum to that in the medium Signup and view all the answers

What happens to the emergent ray when light passes through a rectangular glass slab?

The emergent ray is parallel to the direction of the incident ray Signup and view all the answers

Which of the following is the lens formula?

$\frac{1}{u} + \frac{1}{v} = \frac{1}{f}$ Signup and view all the answers

What will happen if one-half of a convex lens is covered with a black paper?

The lens will produce a partial image of the object Signup and view all the answers

An object 5 cm in length is held 25 cm away from a converging lens of focal length 10 cm. What is the position, size, and nature of the image formed?

The image is formed at 15 cm, is 2.5 cm in size, and is real and inverted Signup and view all the answers

A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens?

20 cm Signup and view all the answers

What does a magnification of +1 produced by a plane mirror mean?

The image is the same size as the object Signup and view all the answers

A doctor has prescribed a corrective lens of power +1.5 D. What type of lens is this?

Converging lens Signup and view all the answers

What is the focal length of a lens with a power of -2.0 D?

-1.0 m Signup and view all the answers

What causes a pencil to appear displaced when partially immersed in water?

The light from the pencil inside water seems to come from a different direction. Signup and view all the answers

If a glass slab is placed over letters, what happens to their appearance?

The letters appear to be raised. Signup and view all the answers

Does the extent of the apparent displacement depend on the medium?

Yes, it depends on the pair of media involved. Signup and view all the answers

What is the phenomenon responsible for the change in the direction of light when it travels obliquely from one medium to another?

Refraction Signup and view all the answers

In the activity with the coin at the bottom of a water-filled bucket, why was it difficult to pick up the coin in one go?

The coin appeared to be at a different depth due to refraction. Signup and view all the answers

What is the purpose of comparing experiences with friends in the coin activity?

To verify that the effect is consistent across different observers. Signup and view all the answers

What is the main topic discussed in the given text?

Reflection and refraction of light Signup and view all the answers

Which of the following statements about the nature of light is true?

Light is neither a wave nor a particle Signup and view all the answers

What is the first law of reflection mentioned in the text?

The angle of incidence is equal to the angle of reflection Signup and view all the answers

Which of the following statements about the laws of reflection is correct?

The laws of reflection apply to all reflecting surfaces, including spherical surfaces Signup and view all the answers

What does the text imply about the formation of an image by a plane mirror?

The properties of the image formed by a plane mirror are well-known Signup and view all the answers

Based on the text, what can be inferred about the scope of the chapter?

The chapter covers both reflection and refraction of light Signup and view all the answers

Quantum Theory of Light

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Questions and Answers

What is the name of the line passing through the pole and the centre of curvature of a spherical mirror?

What is the relationship between the principal axis and the mirror's surface?

Why should you not look directly at the Sun or into a mirror reflecting sunlight?

What happens when you hold a concave mirror towards the Sun and focus the reflected light onto a sheet of paper?

What is the point where the reflected light from the Sun is focused by the concave mirror called?

How can you determine the approximate focal length of the concave mirror using the experiment?

What is the magnification produced by a spherical mirror?

What happens when a light ray travels obliquely from a denser medium to a rarer medium?

What is the speed of light in vacuum?

What is the refractive index of a transparent medium?

What happens to the emergent ray when light passes through a rectangular glass slab?

Which of the following is the lens formula?

What will happen if one-half of a convex lens is covered with a black paper?

An object 5 cm in length is held 25 cm away from a converging lens of focal length 10 cm. What is the position, size, and nature of the image formed?

A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens?

What does a magnification of +1 produced by a plane mirror mean?

A doctor has prescribed a corrective lens of power +1.5 D. What type of lens is this?

What is the focal length of a lens with a power of -2.0 D?

What causes a pencil to appear displaced when partially immersed in water?

If a glass slab is placed over letters, what happens to their appearance?

Does the extent of the apparent displacement depend on the medium?

What is the phenomenon responsible for the change in the direction of light when it travels obliquely from one medium to another?

In the activity with the coin at the bottom of a water-filled bucket, why was it difficult to pick up the coin in one go?

What is the purpose of comparing experiences with friends in the coin activity?

What is the main topic discussed in the given text?

Which of the following statements about the nature of light is true?

What is the first law of reflection mentioned in the text?

Which of the following statements about the laws of reflection is correct?

What does the text imply about the formation of an image by a plane mirror?

Based on the text, what can be inferred about the scope of the chapter?

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