Question

2. Define : Total internal reflection of light.​

Answer 1

Answer:

Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. ... The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle.

Explanation:

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Answer 2

Answer:

Read the passage given here and fill in the blanks with 'will’/ shall' or 'going to'.

Mobiles

be used by millions of people in remote areas within a few years. The

government

..... launch schemes which will benefit the underprevileged section and

make calls much cheaper for them. They

be able to communicate with their

distant relatives and friends easily. This revolution ..

change the way people keep in

be able to talk

touch with each other. An old woman from a distant village said, “I

to my grandchildren everyday.” Mobiles have definitely ushered in a new era of communication.

SIMPLE PRESENT TENSE AND FUTURE ACTIONS

Sometimes, the simple present tense is used to indicate an action that will take place in future

Such sentences usually do not have will/shall or going to forms. Verbs in the simple present tense ar

used to indicate a progressive action, plan or schedule arranged for the future. We can write it in two ways

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