Light - Reflection and Refraction [NSO Level 1- Science Olympiad (SOF) Class 10]: Questions 1 - 7 of 140
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Question 1
Question MCQ▾
The magnification and focal length of a converging lens are and , respectively. The object distance should be:
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 2
Question MCQ▾
An image is formed on the centre of the curvature by convex lens, then the object is:
Choices
Choice (4) | Response | |
---|---|---|
a. | At focal point | |
b. | Far than centre of curvature | |
c. | At centre of the curved | |
d. | Between focal point and centre of the curvature |
Question 3
Question MCQ▾
A convex lens is made by cutting a portion of a hollow glass sphere of radius . So, power of the lens is:
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 4
Question MCQ▾
Two thin lenses of power and are placed in contact. The power of the lens combination is:
Choices
Choice (4) | Response | |
---|---|---|
a. | 2 | |
b. | 1.5 | |
c. | 1 | |
d. | 2.5 |
Question 5
Question MCQ▾
Which of the following have maximum focal length?
Choices
Choice (4) | Response | |
---|---|---|
a. | Convex mirror | |
b. | Concave mirror | |
c. | Convex lens | |
d. | Plane mirror |
Question 6
Question MCQ▾
Focal length of the convex lens is:
Choices
Choice (4) | Response | |
---|---|---|
a. | Always negative | |
b. | Sometime positive, sometime negative | |
c. | Always positive | |
d. | All of the above |
Question 7
Question MCQ▾
If power of a lens is , then radius of the curvature of the lens is:
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |