Question

Expain lenses

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Answer 1

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Step-by-step explanation:

A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. ... Lenses are made from materials such as glass or plastic, and are ground and polished or molded to a desired shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing.

Answer 2

Required Answer :

Q⟩ Explain tenses.

• Answer: The tense is a variety of a verb that is applied to show the time of action that is known as tense.

For example:

• When an action happened.

How many types of tense?

• There are mainly three types of tense in English grammar, that is,
• Present tense.
• Past tense.
• Future tense.

1. Present tense: The present tense indicate that the currently action is being.

For example:

• The singer is singing nicely.
• I am going to a write a letter.

2. Past tense: The past tense indicate that the past work existed.

For example:

• Pankaj watched TV all night.
• Aakash wanted to go to the museum.

3. Future tense: The future tense indicate that the activity does not exist.

For example:

• I will give speech in republic day.
• I will help you to do the project.