Physics
Assertion (A) : Solar eclipse occurs when the earth, moon and sun come in a straight line.
Reason (R) : Solar eclipse occurs on a new moon day.
- Both A and R are true, and R is the correct explanation of A.
- Both A and R are true, but R is not the correct explanation of A.
- A is true, and R is false.
- A is false, and R is true.
Light Energy
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Answer
Both A and R are true, and R is the correct explanation of A.
Reason —
Assertion (A) is true because a solar eclipse happens when the Moon comes between the Earth and the Sun, and all three are aligned in a straight line such that the moon fully or partially covers the sun, as viewed from some parts of the earth.
Reason (R) is true since the light from the sun is blocked by the moon, the shadow of the moon falls on the earth and it becomes dark during the daytime thus, solar eclipse occurs only on a new moon day.
Here, reason (R) correctly explains that during the solar eclipse, the earth, moon and sun come in a straight line because in this position the moon is between the sun and the earth which is called new moon day.
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Related Questions
Assertion (A) : Light scatters when it is passed through air.
Reason (R) : Light maybe be absorbed, deflected, passed through or bounced back.
- Both A and R are true, and R is the correct explanation of A.
- Both A and R are true, but R is not the correct explanation of A.
- A is true, and R is false.
- A is false, and R is true.
Assertion (A) : Opaque objects cast shadows.
Reason (R) : Opaque objects do not allow light to pass through.
- Both A and R are true, and R is the correct explanation of A.
- Both A and R are true, but R is not the correct explanation of A.
- A is true, and R is false.
- A is false, and R is true.
Mona went to Rohini's house on a Sunday morning. She noticed that all the lights in Rohini's house were switched off. She switched on the lights of the house in the evening. Mona also noticed that Rohini switched off the lights and fan every time she left the room.
Now, answer the following questions.
(a) What was the source of light in Rohini's house in the daytime?
(b) What was the source of light in Rohini's house in the evening?
(c) Why do you think she turned off the fans and lights when she left the room every time?
Moon is a non-luminous body. Why do you think it shines?