The earth takes $$24~\text{h}$$ to rotate once about its axis. How much time does the sun take to shift by $$1^{\circ}$$ when viewed from the earth?
1. $$3~\text{minutes}$$

2. $$2~\text{minutes}$$

3. $$1~\text{minutes}$$

4. $$4~\text{minutes}$$

Subtopic: Â Refraction at Curved Surface |
Â 60%
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NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Light from a point source in the air falls on a convex spherical glass surface (n = 1.5 and radius of curvature = 20 cm) of a glass medium which extends till infinity on other side . The distance of the light source from the glass surface is 100 cm. At what position the image is formed?

 1 at a distance of 200 cm from the glass surface, in the direction of incident light. 2 at a distance of 100 cm from the glass surface, in the direction of incident light. 3 at a distance of 200 cm from the glass surface, in the opposite direction of incident light. 4 at a distance of 100 cm from the glass surface, in the opposite direction of incident light.

Subtopic: Â Refraction at Curved Surface |
Â 66%
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NEET 2023 - Target Batch - Aryan Raj Singh
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A magician during a show makes a glass lens with $$n=1.47$$ disappear in a trough of liquid. What is the refractive index of the liquid?
1. $$1.47$$
2. $$1.33$$
3. $$0.66$$
4. $$1.5$$

Subtopic: Â Refraction at Curved Surface |
Â 78%
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NEET 2023 - Target Batch - Aryan Raj Singh
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